lisp/calendar/cal-hebrew.el

   1 ;;; cal-hebrew.el --- calendar functions for the Hebrew calendar
   2
   3 ;; Copyright (C) 1995, 1997, 2001-2013 Free Software Foundation, Inc.
   4
   5 ;; Author: Nachum Dershowitz <nachum@cs.uiuc.edu>
   6 ;;         Edward M. Reingold <reingold@cs.uiuc.edu>
   7 ;; Maintainer: Glenn Morris <rgm@gnu.org>
   8 ;; Keywords: calendar
   9 ;; Human-Keywords: Hebrew calendar, calendar, diary
  10 ;; Package: calendar
  11
  12 ;; This file is part of GNU Emacs.
  13
  14 ;; GNU Emacs is free software: you can redistribute it and/or modify
  15 ;; it under the terms of the GNU General Public License as published by
  16 ;; the Free Software Foundation, either version 3 of the License, or
  17 ;; (at your option) any later version.
  18
  19 ;; GNU Emacs is distributed in the hope that it will be useful,
  20 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  21 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22 ;; GNU General Public License for more details.
  23
  24 ;; You should have received a copy of the GNU General Public License
  25 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  26
  27 ;;; Commentary:
  28
  29 ;; See calendar.el.
  30
  31 ;;; Code:
  32
  33 (require 'calendar)
  34
  35 (define-obsolete-variable-alias 'diary-sabbath-candles-minutes
  36   'diary-hebrew-sabbath-candles-minutes "23.1")
  37
  38 (defcustom diary-hebrew-sabbath-candles-minutes 18
  39   "Number of minutes before sunset for sabbath candle lighting.
  40 Used by `diary-hebrew-sabbath-candles'."
  41   :group 'diary
  42   :type 'integer
  43   :version "21.1")
  44
  45 ;; End of user options.
  46
  47 (defun calendar-hebrew-leap-year-p (year)
  48   "Non-nil if YEAR is a Hebrew calendar leap year."
  49   (< (% (1+ (* 7 year)) 19) 7))
  50
  51 (defun calendar-hebrew-last-month-of-year (year)
  52   "The last month of the Hebrew calendar YEAR."
  53   (if (calendar-hebrew-leap-year-p year)
  54       13
  55     12))
  56
  57 (defun calendar-hebrew-elapsed-days (year)
  58   "Days to mean conjunction of Tishri of Hebrew YEAR.
  59 Measured from Sunday before start of Hebrew calendar."
  60   (let* ((months-elapsed
  61           (+ (* 235 (/ (1- year) 19)) ; months in complete cycles so far
  62              (* 12 (% (1- year) 19))  ; regular months in this cycle
  63              (/ (1+ (* 7 (% (1- year) 19))) 19))) ; leap months this cycle
  64          (parts-elapsed (+ 204 (* 793 (% months-elapsed 1080))))
  65          (hours-elapsed (+ 5
  66                            (* 12 months-elapsed)
  67                            (* 793 (/ months-elapsed 1080))
  68                            (/ parts-elapsed 1080)))
  69          (parts                         ; conjunction parts
  70           (+ (* 1080 (% hours-elapsed 24)) (% parts-elapsed 1080)))
  71          (day                           ; conjunction day
  72           (+ 1 (* 29 months-elapsed) (/ hours-elapsed 24)))
  73          (alternative-day
  74           (if (or (>= parts 19440) ; if the new moon is at or after midday
  75                   (and (= (% day 7) 2)  ; ...or is on a Tuesday...
  76                        (>= parts 9924) ; at 9 hours, 204 parts or later...
  77                        ;; of a common year...
  78                        (not (calendar-hebrew-leap-year-p year)))
  79                   (and (= (% day 7) 1)  ; ...or is on a Monday...
  80                        (>= parts 16789) ; at 15 hours, 589 parts or later...
  81                        ;; at the end of a leap year.
  82                        (calendar-hebrew-leap-year-p (1- year))))
  83               ;; Then postpone Rosh HaShanah one day.
  84               (1+ day)
  85             ;; Else:
  86             day)))
  87     ;; If Rosh HaShanah would occur on Sunday, Wednesday, or Friday
  88     (if (memq (% alternative-day 7) (list 0 3 5))
  89         ;; Then postpone it one (more) day and return.
  90         (1+ alternative-day)
  91       ;; Else return.
  92       alternative-day)))
  93
  94 (defun calendar-hebrew-days-in-year (year)
  95   "Number of days in Hebrew YEAR."
  96   (- (calendar-hebrew-elapsed-days (1+ year))
  97      (calendar-hebrew-elapsed-days year)))
  98
  99 (defun calendar-hebrew-long-heshvan-p (year)
 100   "Non-nil if Heshvan is long in Hebrew YEAR."
 101   (= (% (calendar-hebrew-days-in-year year) 10) 5))
 102
 103 (defun calendar-hebrew-short-kislev-p (year)
 104   "Non-nil if Kislev is short in Hebrew YEAR."
 105   (= (% (calendar-hebrew-days-in-year year) 10) 3))
 106
 107 (defun calendar-hebrew-last-day-of-month (month year)
 108   "The last day of MONTH in YEAR."
 109   (if (or (memq month (list 2 4 6 10 13))
 110           (and (= month 12) (not (calendar-hebrew-leap-year-p year)))
 111           (and (= month 8) (not (calendar-hebrew-long-heshvan-p year)))
 112           (and (= month 9) (calendar-hebrew-short-kislev-p year)))
 113       29
 114     30))
 115
 116 (defun calendar-hebrew-to-absolute (date)
 117   "Absolute date of Hebrew DATE.
 118 The absolute date is the number of days elapsed since the (imaginary)
 119 Gregorian date Sunday, December 31, 1 BC."
 120   (let ((month (calendar-extract-month date))
 121         (day (calendar-extract-day date))
 122         (year (calendar-extract-year date)))
 123     (+ day                              ; days so far this month
 124        (if (< month 7)                  ; before Tishri
 125            ;; Then add days in prior months this year before and after Nisan.
 126            (+ (calendar-sum
 127                m 7 (<= m (calendar-hebrew-last-month-of-year year))
 128                (calendar-hebrew-last-day-of-month m year))
 129               (calendar-sum
 130                m 1 (< m month)
 131                (calendar-hebrew-last-day-of-month m year)))
 132          ;; Else add days in prior months this year.
 133          (calendar-sum
 134           m 7 (< m month)
 135           (calendar-hebrew-last-day-of-month m year)))
 136        (calendar-hebrew-elapsed-days year) ; days in prior years
 137        -1373429)))               ; days elapsed before absolute date 1
 138
 139 (define-obsolete-function-alias 'calendar-absolute-from-hebrew
 140   'calendar-hebrew-to-absolute "23.1")
 141
 142 (defun calendar-hebrew-from-absolute (date)
 143   "Compute the Hebrew date (month day year) corresponding to absolute DATE.
 144 The absolute date is the number of days elapsed since the (imaginary)
 145 Gregorian date Sunday, December 31, 1 BC."
 146   (let* ((greg-date (calendar-gregorian-from-absolute date))
 147          (year (+ 3760 (calendar-extract-year greg-date)))
 148          (month (aref [9 10 11 12 1 2 3 4 7 7 7 8]
 149                       (1- (calendar-extract-month greg-date))))
 150          (length (progn
 151                    (while (>= date (calendar-hebrew-to-absolute
 152                                     (list 7 1 (1+ year))))
 153                      (setq year (1+ year)))
 154                    (calendar-hebrew-last-month-of-year year)))
 155          day)
 156     (while (> date
 157               (calendar-hebrew-to-absolute
 158                (list month
 159                      (calendar-hebrew-last-day-of-month month year)
 160                      year)))
 161       (setq month (1+ (% month length))))
 162     (setq day (1+
 163                (- date (calendar-hebrew-to-absolute (list month 1 year)))))
 164     (list month day year)))
 165
 166 (defconst calendar-hebrew-month-name-array-common-year
 167   ["Nisan" "Iyar" "Sivan" "Tammuz" "Av" "Elul" "Tishri"
 168    "Heshvan" "Kislev" "Teveth" "Shevat" "Adar"]
 169   "Array of strings giving the names of the Hebrew months in a common year.")
 170
 171 (defconst calendar-hebrew-month-name-array-leap-year
 172   ["Nisan" "Iyar" "Sivan" "Tammuz" "Av" "Elul" "Tishri"
 173    "Heshvan" "Kislev" "Teveth" "Shevat" "Adar I" "Adar II"]
 174   "Array of strings giving the names of the Hebrew months in a leap year.")
 175
 176 ;;;###cal-autoload
 177 (defun calendar-hebrew-date-string (&optional date)
 178   "String of Hebrew date before sunset of Gregorian DATE.
 179 Defaults to today's date if DATE is not given.
 180 Driven by the variable `calendar-date-display-form'."
 181   (let* ((hebrew-date (calendar-hebrew-from-absolute
 182                        (calendar-absolute-from-gregorian
 183                         (or date (calendar-current-date)))))
 184          (calendar-month-name-array
 185           (if (calendar-hebrew-leap-year-p (calendar-extract-year hebrew-date))
 186               calendar-hebrew-month-name-array-leap-year
 187             calendar-hebrew-month-name-array-common-year)))
 188     (calendar-date-string hebrew-date nil t)))
 189
 190 ;;;###cal-autoload
 191 (defun calendar-hebrew-print-date ()
 192   "Show the Hebrew calendar equivalent of the date under the cursor."
 193   (interactive)
 194   (message "Hebrew date (until sunset): %s"
 195            (calendar-hebrew-date-string (calendar-cursor-to-date t))))
 196
 197 (define-obsolete-function-alias 'calendar-print-hebrew-date
 198   'calendar-hebrew-print-date "23.1")
 199
 200 (defun calendar-hebrew-yahrzeit (death-date year)
 201   "Absolute date of the anniversary of Hebrew DEATH-DATE in Hebrew YEAR."
 202   (let ((death-day (calendar-extract-day death-date))
 203         (death-month (calendar-extract-month death-date))
 204         (death-year (calendar-extract-year death-date)))
 205     (cond
 206      ;; If it's Heshvan 30 it depends on the first anniversary; if
 207      ;; that was not Heshvan 30, use the day before Kislev 1.
 208      ((and (= death-month 8)
 209            (= death-day 30)
 210            (not (calendar-hebrew-long-heshvan-p (1+ death-year))))
 211       (1- (calendar-hebrew-to-absolute (list 9 1 year))))
 212      ;; If it's Kislev 30 it depends on the first anniversary; if that
 213      ;; was not Kislev 30, use the day before Teveth 1.
 214      ((and (= death-month 9)
 215            (= death-day 30)
 216            (calendar-hebrew-short-kislev-p (1+ death-year)))
 217       (1- (calendar-hebrew-to-absolute (list 10 1 year))))
 218      ;; If it's Adar II, use the same day in last month of year (Adar
 219      ;; or Adar II).
 220      ((= death-month 13)
 221       (calendar-hebrew-to-absolute
 222        (list (calendar-hebrew-last-month-of-year year) death-day year)))
 223      ;; If it's the 30th in Adar I and year is not a leap year (so
 224      ;; Adar has only 29 days), use the last day in Shevat.
 225      ((and (= death-day 30)
 226            (= death-month 12)
 227            (not (calendar-hebrew-leap-year-p year)))
 228       (calendar-hebrew-to-absolute (list 11 30 year)))
 229      ;; In all other cases, use the normal anniversary of the date of death.
 230      (t (calendar-hebrew-to-absolute
 231          (list death-month death-day year))))))
 232
 233 (define-obsolete-function-alias 'hebrew-calendar-yahrzeit
 234   'calendar-hebrew-yahrzeit "23.1")
 235
 236 (defun calendar-hebrew-read-date ()
 237   "Interactively read the arguments for a Hebrew date command.
 238 Reads a year, month, and day."
 239   (let* ((today (calendar-current-date))
 240          (year (calendar-read
 241                 "Hebrew calendar year (>3760): "
 242                 (lambda (x) (> x 3760))
 243                 (number-to-string
 244                  (calendar-extract-year
 245                   (calendar-hebrew-from-absolute
 246                    (calendar-absolute-from-gregorian today))))))
 247          (month-array (if (calendar-hebrew-leap-year-p year)
 248                           calendar-hebrew-month-name-array-leap-year
 249                         calendar-hebrew-month-name-array-common-year))
 250          (completion-ignore-case t)
 251          (month (cdr (assoc-string
 252                       (completing-read
 253                        "Hebrew calendar month name: "
 254                        (mapcar 'list (append month-array nil))
 255                        (if (= year 3761)
 256                            (lambda (x)
 257                              (let ((m (cdr
 258                                        (assoc-string
 259                                         (car x)
 260                                         (calendar-make-alist month-array)
 261                                         t))))
 262                                (< 0
 263                                   (calendar-hebrew-to-absolute
 264                                    (list m
 265                                          (calendar-hebrew-last-day-of-month
 266                                           m year)
 267                                          year))))))
 268                        t)
 269                       (calendar-make-alist month-array 1) t)))
 270          (last (calendar-hebrew-last-day-of-month month year))
 271          (first (if (and (= year 3761) (= month 10))
 272                     18 1))
 273          (day (calendar-read
 274                (format "Hebrew calendar day (%d-%d): "
 275                        first last)
 276                (lambda (x) (and (<= first x) (<= x last))))))
 277     (list (list month day year))))
 278
 279 ;;;###cal-autoload
 280 (defun calendar-hebrew-goto-date (date &optional noecho)
 281   "Move cursor to Hebrew DATE; echo Hebrew date unless NOECHO is non-nil."
 282   (interactive (calendar-hebrew-read-date))
 283   (calendar-goto-date (calendar-gregorian-from-absolute
 284                        (calendar-hebrew-to-absolute date)))
 285   (or noecho (calendar-hebrew-print-date)))
 286
 287 (define-obsolete-function-alias 'calendar-goto-hebrew-date
 288   'calendar-hebrew-goto-date "23.1")
 289
 290 (defvar displayed-month)                ; from calendar-generate
 291
 292 (defun calendar-hebrew-date-is-visible-p (month day)
 293   "Return non-nil if Hebrew MONTH DAY is visible in the calendar window.
 294 Returns the corresponding Gregorian date."
 295   ;; This test is only to speed things up a bit; it works fine without it.
 296   (if (memq displayed-month
 297             ;; What this is doing is equivalent to +1,2,3,4,5 modulo 12, ie:
 298             ;;  (mapcar (lambda (n) (let ((x (mod n 12)))
 299             ;;                        (if (zerop x) 12
 300             ;;                          x)))
 301             ;;          (number-sequence (1+ month) (+ 5 month)))
 302             ;; Ie it makes a list:
 303             ;;  2  3  4  5  6 when month = 1
 304             ;;  3  4  5  6  7 when month = 2
 305             ;; ...
 306             ;;  8  9 10 11 12 when month = 7
 307             ;;  9 10 11 12  1 when month = 8
 308             ;; ...
 309             ;; 12  1  2  3  4 when month = 11
 310             ;;  1  2  3  4  5 when month = 12
 311             ;; This implies that hebrew month N cannot occur outside
 312             ;; Gregorian months N:N+6 (the calendar shows
 313             ;; displayed-month +/- 1 at any time).
 314             ;; So to put it another way:
 315             ;;  (calendar-interval month 1 displayed-month
 316             ;;                    (if (> month displayed-month) 2 1))
 317             ;; must be >= 1 and <= 5.  This could be expanded to:
 318             ;;  (if (> month displayed-month) (+ 12 (- displayed-month month))
 319             ;;    (- displayed-month month)
 320             (list
 321              (if (< 11 month) (- month 11) (+ month 1))
 322              (if (< 10 month) (- month 10) (+ month 2))
 323              (if (<  9 month) (- month  9) (+ month 3))
 324              (if (<  8 month) (- month  8) (+ month 4))
 325              (if (<  7 month) (- month  7) (+ month 5))))
 326       (calendar-nongregorian-visible-p
 327        month day 'calendar-hebrew-to-absolute
 328        'calendar-hebrew-from-absolute
 329        ;; Hebrew new year is start of month 7.
 330        ;; If hmonth >= 7, choose the higher year.
 331        (lambda (m) (> m 6)))))
 332
 333 ;;;###holiday-autoload
 334 (defun holiday-hebrew (month day string)
 335   "Holiday on MONTH, DAY (Hebrew) called STRING.
 336 If MONTH, DAY (Hebrew) is visible, the value returned is corresponding
 337 Gregorian date in the form of the list (((month day year) STRING)).  Returns
 338 nil if it is not visible in the current calendar window."
 339   (let ((gdate (calendar-hebrew-date-is-visible-p month day)))
 340     (if gdate (list (list gdate string)))))
 341
 342 ;; h-r-h-e should be called from holidays code.
 343 (declare-function holiday-filter-visible-calendar "holidays" (l))
 344
 345 (defvar displayed-year)
 346
 347 ;;;###holiday-autoload
 348 (defun holiday-hebrew-rosh-hashanah (&optional all)
 349   "List of dates related to Rosh Hashanah, as visible in calendar window.
 350 Shows only the major holidays, unless `calendar-hebrew-all-holidays-flag'
 351 or ALL is non-nil."
 352   (when (memq displayed-month '(8 9 10 11))
 353     (let ((abs-r-h (calendar-hebrew-to-absolute
 354                     (list 7 1 (+ displayed-year 3761)))))
 355       (holiday-filter-visible-calendar
 356        (append
 357         (list
 358          (list (calendar-gregorian-from-absolute abs-r-h)
 359                (format "Rosh HaShanah %d" (+ 3761 displayed-year)))
 360          (list (calendar-gregorian-from-absolute (+ abs-r-h 9))
 361                "Yom Kippur")
 362          (list (calendar-gregorian-from-absolute (+ abs-r-h 14))
 363                "Sukkot")
 364          (list (calendar-gregorian-from-absolute (+ abs-r-h 21))
 365                "Shemini Atzeret")
 366          (list (calendar-gregorian-from-absolute (+ abs-r-h 22))
 367                "Simchat Torah"))
 368         (when (or all calendar-hebrew-all-holidays-flag)
 369           (list
 370            (list (calendar-gregorian-from-absolute
 371                   (calendar-dayname-on-or-before 6 (- abs-r-h 4)))
 372                  "Selichot (night)")
 373            (list (calendar-gregorian-from-absolute (1- abs-r-h))
 374                  "Erev Rosh HaShanah")
 375            (list (calendar-gregorian-from-absolute (1+ abs-r-h))
 376                  "Rosh HaShanah (second day)")
 377            (list (calendar-gregorian-from-absolute
 378                   (+ abs-r-h (if (= (% abs-r-h 7) 4) 3 2)))
 379                  "Tzom Gedaliah")
 380            (list (calendar-gregorian-from-absolute
 381                   (calendar-dayname-on-or-before 6 (+ 7 abs-r-h)))
 382                  "Shabbat Shuvah")
 383            (list (calendar-gregorian-from-absolute (+ abs-r-h 8))
 384                  "Erev Yom Kippur")
 385            (list (calendar-gregorian-from-absolute (+ abs-r-h 13))
 386                  "Erev Sukkot")
 387            (list (calendar-gregorian-from-absolute (+ abs-r-h 15))
 388                  "Sukkot (second day)")
 389            (list (calendar-gregorian-from-absolute (+ abs-r-h 16))
 390                  "Hol Hamoed Sukkot (first day)")
 391            (list (calendar-gregorian-from-absolute (+ abs-r-h 17))
 392                  "Hol Hamoed Sukkot (second day)")
 393            (list (calendar-gregorian-from-absolute (+ abs-r-h 18))
 394                  "Hol Hamoed Sukkot (third day)")
 395            (list (calendar-gregorian-from-absolute (+ abs-r-h 19))
 396                  "Hol Hamoed Sukkot (fourth day)")
 397            (list (calendar-gregorian-from-absolute (+ abs-r-h 20))
 398                    "Hoshanah Rabbah"))))))))
 399
 400 ;;;###holiday-autoload
 401 (define-obsolete-function-alias 'holiday-rosh-hashanah-etc
 402   'holiday-hebrew-rosh-hashanah "23.1")
 403
 404 ;;;###holiday-autoload
 405 (defun holiday-hebrew-hanukkah (&optional all)
 406   "List of dates related to Hanukkah, as visible in calendar window.
 407 Shows only Hanukkah, unless `calendar-hebrew-all-holidays-flag' or ALL
 408 is non-nil."
 409   ;; This test is only to speed things up a bit, it works fine without it.
 410   (when (memq displayed-month '(10 11 12 1 2))
 411     (let* ((m displayed-month)
 412            (y displayed-year)
 413            (h-y (progn
 414                   (calendar-increment-month m y 1)
 415                   (calendar-extract-year
 416                    (calendar-hebrew-from-absolute
 417                     (calendar-absolute-from-gregorian
 418                      (list m (calendar-last-day-of-month m y) y))))))
 419            (abs-h (calendar-hebrew-to-absolute (list 9 25 h-y)))
 420            (ord ["first" "second" "third" "fourth" "fifth" "sixth"
 421                  "seventh" "eighth"])
 422            han)
 423       (holiday-filter-visible-calendar
 424        (if (or all calendar-hebrew-all-holidays-flag)
 425            (append
 426             (list
 427              (list (calendar-gregorian-from-absolute (1- abs-h))
 428                    "Erev Hanukkah"))
 429             (dotimes (i 8 (nreverse han))
 430               (push (list
 431                      (calendar-gregorian-from-absolute (+ abs-h i))
 432                      (format "Hanukkah (%s day)" (aref ord i)))
 433                     han)))
 434          (list (list (calendar-gregorian-from-absolute abs-h) "Hanukkah")))))))
 435
 436 ;;;###holiday-autoload
 437 (define-obsolete-function-alias 'holiday-hanukkah
 438   'holiday-hebrew-hanukkah "23.1")
 439
 440 ;;;###holiday-autoload
 441 (defun holiday-hebrew-passover (&optional all)
 442   "List of dates related to Passover, as visible in calendar window.
 443 Shows only the major holidays, unless `calendar-hebrew-all-holidays-flag'
 444 or ALL is non-nil."
 445   (when (< displayed-month 8)
 446     (let ((abs-p (calendar-hebrew-to-absolute
 447                   (list 1 15 (+ displayed-year 3760)))))
 448       (holiday-filter-visible-calendar
 449        ;; The first two are out of order when the others are added.
 450        (append
 451         (list
 452          (list (calendar-gregorian-from-absolute abs-p) "Passover")
 453          (list (calendar-gregorian-from-absolute (+ abs-p 50))
 454                     "Shavuot"))
 455         (when (or all calendar-hebrew-all-holidays-flag)
 456           (let ((wday (% abs-p 7)))
 457             (list
 458              (list (calendar-gregorian-from-absolute
 459                     (calendar-dayname-on-or-before 6 (- abs-p 43)))
 460                    "Shabbat Shekalim")
 461              (list (calendar-gregorian-from-absolute
 462                     (calendar-dayname-on-or-before 6 (- abs-p 30)))
 463                    "Shabbat Zachor")
 464              (list (calendar-gregorian-from-absolute
 465                     (- abs-p (if (= wday 2) 33 31)))
 466                    "Fast of Esther")
 467              (list (calendar-gregorian-from-absolute (- abs-p 31))
 468                    "Erev Purim")
 469              (list (calendar-gregorian-from-absolute (- abs-p 30))
 470                    "Purim")
 471              (list (calendar-gregorian-from-absolute
 472                     (- abs-p (if (zerop wday) 28 29)))
 473                    "Shushan Purim")
 474              (list (calendar-gregorian-from-absolute
 475                     (- (calendar-dayname-on-or-before 6 (- abs-p 14)) 7))
 476                    "Shabbat Parah")
 477              (list (calendar-gregorian-from-absolute
 478                     (calendar-dayname-on-or-before 6 (- abs-p 14)))
 479                    "Shabbat HaHodesh")
 480              (list (calendar-gregorian-from-absolute
 481                     (calendar-dayname-on-or-before 6 (1- abs-p)))
 482                    "Shabbat HaGadol")
 483              (list (calendar-gregorian-from-absolute (1- abs-p))
 484                    "Erev Passover")
 485              (list (calendar-gregorian-from-absolute (1+ abs-p))
 486                    "Passover (second day)")
 487              (list (calendar-gregorian-from-absolute (+ abs-p 2))
 488                    "Hol Hamoed Passover (first day)")
 489              (list (calendar-gregorian-from-absolute (+ abs-p 3))
 490                    "Hol Hamoed Passover (second day)")
 491              (list (calendar-gregorian-from-absolute (+ abs-p 4))
 492                    "Hol Hamoed Passover (third day)")
 493              (list (calendar-gregorian-from-absolute (+ abs-p 5))
 494                    "Hol Hamoed Passover (fourth day)")
 495              (list (calendar-gregorian-from-absolute (+ abs-p 6))
 496                    "Passover (seventh day)")
 497              (list (calendar-gregorian-from-absolute (+ abs-p 7))
 498                    "Passover (eighth day)")
 499              (list (calendar-gregorian-from-absolute
 500                     (+ abs-p (if (zerop (% (+ abs-p 12) 7))
 501                                  13
 502                                12)))
 503                    "Yom HaShoah")
 504              (list (calendar-gregorian-from-absolute
 505                     (+ abs-p
 506                        ;; If falls on Sat or Fri, moves to preceding Thurs.
 507                        ;; If falls on Mon, moves to Tues (since 2004).
 508                        (cond ((zerop wday) 18) ; Sat
 509                              ((= wday 6) 19)   ; Fri
 510                              ((= wday 2) 21)   ; Mon
 511                              (t 20))))
 512                    "Yom HaAtzma'ut")
 513              (list (calendar-gregorian-from-absolute (+ abs-p 33))
 514                    "Lag BaOmer")
 515              (list (calendar-gregorian-from-absolute (+ abs-p 43))
 516                    "Yom Yerushalaim")
 517              (list (calendar-gregorian-from-absolute (+ abs-p 49))
 518                    "Erev Shavuot")
 519              (list (calendar-gregorian-from-absolute (+ abs-p 51))
 520                    "Shavuot (second day)")))))))))
 521
 522 ;;;###holiday-autoload
 523 (define-obsolete-function-alias 'holiday-passover-etc
 524   'holiday-hebrew-passover "23.1")
 525
 526 ;;;###holiday-autoload
 527 (defun holiday-hebrew-tisha-b-av ()
 528   "List of dates around Tisha B'Av, as visible in calendar window."
 529   (when (memq displayed-month '(5 6 7 8 9))
 530     (let* ((abs-t-a (calendar-hebrew-to-absolute
 531                      (list 5 9 (+ displayed-year 3760))))
 532            (wday (% abs-t-a 7)))
 533       (holiday-filter-visible-calendar
 534        (list
 535         (list (calendar-gregorian-from-absolute
 536                (- abs-t-a (if (= wday 6) 20 21)))
 537               "Tzom Tammuz")
 538         (list (calendar-gregorian-from-absolute
 539                (calendar-dayname-on-or-before 6 abs-t-a))
 540               "Shabbat Hazon")
 541         (list (calendar-gregorian-from-absolute
 542                (if (= wday 6) (1+ abs-t-a) abs-t-a))
 543               "Tisha B'Av")
 544         (list (calendar-gregorian-from-absolute
 545                (calendar-dayname-on-or-before 6 (+ abs-t-a 7)))
 546               "Shabbat Nahamu"))))))
 547
 548 ;;;###holiday-autoload
 549 (define-obsolete-function-alias 'holiday-tisha-b-av-etc
 550   'holiday-hebrew-tisha-b-av "23.1")
 551
 552 (autoload 'holiday-julian "cal-julian")
 553
 554 ;;;###holiday-autoload
 555 (defun holiday-hebrew-misc ()
 556   "Miscellaneous Hebrew holidays, if visible in calendar window.
 557 Includes: Tal Umatar, Tzom Teveth, Tu B'Shevat, Shabbat Shirah, and
 558 Kiddush HaHamah."
 559   (let ((m displayed-month)
 560         (y displayed-year)
 561         year h-year)
 562     (append
 563      (holiday-julian
 564       11
 565       (progn
 566         (calendar-increment-month m y -1)
 567         (setq year (calendar-extract-year
 568                     (calendar-julian-from-absolute
 569                      (calendar-absolute-from-gregorian (list m 1 y)))))
 570         (if (zerop (% (1+ year) 4))
 571             22
 572           21)) "\"Tal Umatar\" (evening)")
 573      (holiday-hebrew
 574       10
 575       (progn
 576         (setq h-year (calendar-extract-year
 577                       (calendar-hebrew-from-absolute
 578                        (calendar-absolute-from-gregorian
 579                         (list displayed-month 28 displayed-year)))))
 580         (if (= 6 (% (calendar-hebrew-to-absolute (list 10 10 h-year))
 581                     7))
 582             11 10))
 583       "Tzom Teveth")
 584      (holiday-hebrew 11 15 "Tu B'Shevat")
 585      (holiday-hebrew
 586       11
 587       (progn
 588         (setq m displayed-month
 589               y displayed-year
 590               h-year (progn
 591                        (calendar-increment-month m y 1)
 592                        (calendar-extract-year
 593                         (calendar-hebrew-from-absolute
 594                          (calendar-absolute-from-gregorian
 595                           (list m (calendar-last-day-of-month m y) y))))))
 596         (calendar-extract-day
 597          (calendar-hebrew-from-absolute
 598           (calendar-dayname-on-or-before
 599            6 (calendar-hebrew-to-absolute
 600               (list 11
 601                     (if (= 6
 602                            (% (calendar-hebrew-to-absolute
 603                                (list 7 1 h-year))
 604                               7))
 605                         17 16) h-year))))))
 606       "Shabbat Shirah")
 607      (and (progn
 608             (setq m displayed-month
 609                   y displayed-year
 610                   year (progn
 611                          (calendar-increment-month m y -1)
 612                          (calendar-extract-year
 613                           (calendar-julian-from-absolute
 614                            (calendar-absolute-from-gregorian (list m 1 y))))))
 615             (= 21 (% year 28)))
 616           (holiday-julian 3 26 "Kiddush HaHamah")))))
 617
 618
 619 (autoload 'diary-list-entries-1 "diary-lib")
 620
 621 ;;;###diary-autoload
 622 (defun diary-hebrew-list-entries ()
 623   "Add any Hebrew date entries from the diary file to `diary-entries-list'.
 624 Hebrew date diary entries must be prefaced by `diary-hebrew-entry-symbol'
 625 \(normally an `H').  The same diary date forms govern the style
 626 of the Hebrew calendar entries, except that the Hebrew month
 627 names cannot be abbreviated.  The Hebrew months are numbered
 628 from 1 to 13 with Nisan being 1, 12 being Adar I and 13 being
 629 Adar II; you must use `Adar I' if you want Adar of a common
 630 Hebrew year.  If a Hebrew date diary entry begins with
 631 `diary-nonmarking-symbol', the entry will appear in the diary
 632 listing, but will not be marked in the calendar.  This function
 633 is provided for use with `diary-nongregorian-listing-hook'."
 634   (diary-list-entries-1 calendar-hebrew-month-name-array-leap-year
 635                         diary-hebrew-entry-symbol
 636                         'calendar-hebrew-from-absolute))
 637 ;;;###diary-autoload
 638 (define-obsolete-function-alias 'list-hebrew-diary-entries
 639   'diary-hebrew-list-entries "23.1")
 640
 641 (autoload 'calendar-mark-complex "diary-lib")
 642
 643 ;;;###diary-autoload
 644 (defun calendar-hebrew-mark-date-pattern (month day year &optional color)
 645   "Mark dates in calendar window that conform to Hebrew date MONTH/DAY/YEAR.
 646 A value of 0 in any position is a wildcard.  Optional argument COLOR is
 647 passed to `calendar-mark-visible-date' as MARK."
 648   ;; FIXME not the same as the Bahai and Islamic cases, so can't use
 649   ;; calendar-mark-1.
 650   (with-current-buffer calendar-buffer
 651     (if (and (not (zerop month)) (not (zerop day)))
 652         (if (not (zerop year))
 653             ;; Fully specified Hebrew date.
 654             (let ((date (calendar-gregorian-from-absolute
 655                          (calendar-hebrew-to-absolute
 656                           (list month day year)))))
 657               (if (calendar-date-is-visible-p date)
 658                   (calendar-mark-visible-date date color)))
 659           ;; Month and day in any year.
 660           (let ((gdate (calendar-hebrew-date-is-visible-p month day)))
 661             (if gdate (calendar-mark-visible-date gdate color))))
 662       (calendar-mark-complex month day year
 663                              'calendar-hebrew-from-absolute color))))
 664
 665 ;;;###diary-autoload
 666 (define-obsolete-function-alias 'mark-hebrew-calendar-date-pattern
 667   'calendar-hebrew-mark-date-pattern "23.1")
 668
 669 (autoload 'diary-mark-entries-1 "diary-lib")
 670
 671 ;;;###diary-autoload
 672 (defun diary-hebrew-mark-entries ()
 673   "Mark days in the calendar window that have Hebrew date diary entries.
 674 Marks each entry in `diary-file' (or included files) visible in the calendar
 675 window.  See `list-hebrew-diary-entries' for more information."
 676   (diary-mark-entries-1 'calendar-hebrew-mark-date-pattern
 677                         calendar-hebrew-month-name-array-leap-year
 678                         diary-hebrew-entry-symbol
 679                         'calendar-hebrew-from-absolute))
 680
 681 ;;;###diary-autoload
 682 (define-obsolete-function-alias 'mark-hebrew-diary-entries
 683   'diary-hebrew-mark-entries "23.1")
 684
 685 (autoload 'diary-insert-entry-1 "diary-lib")
 686
 687 ;;;###cal-autoload
 688 (defun diary-hebrew-insert-entry (arg)
 689   "Insert a diary entry for the Hebrew date at point.
 690 Prefix argument ARG makes the entry nonmarking."
 691   (interactive "P")
 692   (diary-insert-entry-1 nil arg calendar-hebrew-month-name-array-leap-year
 693                         diary-hebrew-entry-symbol
 694                         'calendar-hebrew-from-absolute))
 695
 696 ;;;###diary-autoload
 697 (define-obsolete-function-alias 'insert-hebrew-diary-entry
 698   'diary-hebrew-insert-entry "23.1")
 699
 700 ;;;###cal-autoload
 701 (defun diary-hebrew-insert-monthly-entry (arg)
 702   "Insert a monthly diary entry.
 703 For the day of the Hebrew month corresponding to the date indicated by point.
 704 Prefix argument ARG makes the entry nonmarking."
 705   (interactive "P")
 706   (diary-insert-entry-1 'monthly arg calendar-hebrew-month-name-array-leap-year
 707                         diary-hebrew-entry-symbol
 708                         'calendar-hebrew-from-absolute))
 709 ;;;###diary-autoload
 710 (define-obsolete-function-alias 'insert-monthly-hebrew-diary-entry
 711   'diary-hebrew-insert-monthly-entry "23.1")
 712
 713 ;;;###cal-autoload
 714 (defun diary-hebrew-insert-yearly-entry (arg)
 715   "Insert an annual diary entry.
 716 For the day of the Hebrew year corresponding to the date indicated by point.
 717 Prefix argument ARG makes the entry nonmarking."
 718   (interactive "P")
 719   (diary-insert-entry-1 'yearly arg calendar-hebrew-month-name-array-leap-year
 720                         diary-hebrew-entry-symbol
 721                         'calendar-hebrew-from-absolute))
 722 ;;;###diary-autoload
 723 (define-obsolete-function-alias 'insert-yearly-hebrew-diary-entry
 724   'diary-hebrew-insert-yearly-entry "23.1")
 725
 726 ;;;###autoload
 727 (defun calendar-hebrew-list-yahrzeits (death-date start-year end-year)
 728   "List Yahrzeit dates for *Gregorian* DEATH-DATE from START-YEAR to END-YEAR.
 729 When called interactively from the calendar window, the date of death is taken
 730 from the cursor position."
 731   (interactive
 732    (let* ((death-date
 733            (if (equal (current-buffer) (get-buffer calendar-buffer))
 734                (calendar-cursor-to-date t)
 735              (let* ((today (calendar-current-date))
 736                     (year (calendar-read
 737                            "Year of death (>0): "
 738                            (lambda (x) (> x 0))
 739                            (number-to-string (calendar-extract-year today))))
 740                     (month-array calendar-month-name-array)
 741                     (completion-ignore-case t)
 742                     (month (cdr (assoc-string
 743                                  (completing-read
 744                                   "Month of death (name): "
 745                                   (mapcar 'list (append month-array nil))
 746                                   nil t)
 747                                  (calendar-make-alist month-array 1) t)))
 748                     (last (calendar-last-day-of-month month year))
 749                     (day (calendar-read
 750                           (format "Day of death (1-%d): " last)
 751                           (lambda (x) (and (< 0 x) (<= x last))))))
 752                (list month day year))))
 753           (death-year (calendar-extract-year death-date))
 754           (start-year (calendar-read
 755                        (format "Starting year of Yahrzeit table (>%d): "
 756                                death-year)
 757                        (lambda (x) (> x death-year))
 758                        (number-to-string (1+ death-year))))
 759           (end-year (calendar-read
 760                      (format "Ending year of Yahrzeit table (>=%d): "
 761                              start-year)
 762                      (lambda (x) (>= x start-year)))))
 763      (list death-date start-year end-year)))
 764   (message "Computing Yahrzeits...")
 765   (let* ((h-date (calendar-hebrew-from-absolute
 766                   (calendar-absolute-from-gregorian death-date)))
 767          (h-year (calendar-extract-year h-date))
 768          (i (1- start-year)))
 769     (calendar-in-read-only-buffer calendar-hebrew-yahrzeit-buffer
 770       (calendar-set-mode-line
 771        (format "Yahrzeit dates for %s = %s"
 772                (calendar-date-string death-date)
 773                (let ((calendar-month-name-array
 774                       (if (calendar-hebrew-leap-year-p h-year)
 775                           calendar-hebrew-month-name-array-leap-year
 776                         calendar-hebrew-month-name-array-common-year)))
 777                  (calendar-date-string h-date nil t))))
 778       (while (<= (setq i (1+ i)) end-year)
 779         (insert
 780          (calendar-date-string
 781           (calendar-gregorian-from-absolute
 782            (calendar-hebrew-yahrzeit
 783             h-date
 784             (calendar-extract-year
 785              (calendar-hebrew-from-absolute
 786               (calendar-absolute-from-gregorian (list 1 1 i))))))) "\n"))))
 787   (message "Computing Yahrzeits...done"))
 788
 789 ;;;###autoload
 790 (define-obsolete-function-alias 'list-yahrzeit-dates
 791   'calendar-hebrew-list-yahrzeits "23.1")
 792
 793 (defun calendar-hebrew-birthday (date year)
 794   "Absolute date of the anniversary of Hebrew birth DATE, in Hebrew YEAR."
 795   (let ((b-day (calendar-extract-day date))
 796         (b-month (calendar-extract-month date))
 797         (b-year (calendar-extract-year date)))
 798     ;; If it's Adar in a normal Hebrew year or Adar II in a Hebrew leap year...
 799     (if (= b-month (calendar-hebrew-last-month-of-year b-year))
 800         ;; ...then use the same day in last month of Hebrew year.
 801         (calendar-hebrew-to-absolute
 802          (list (calendar-hebrew-last-month-of-year year) b-day year))
 803       ;; Else use the normal anniversary of the birth date,
 804       ;; or the corresponding day in years without that date.
 805       (+ (calendar-hebrew-to-absolute (list b-month 1 year)) b-day -1))))
 806
 807 (defvar date)
 808
 809 ;; To be called from diary-list-sexp-entries, where DATE is bound.
 810 ;;;###diary-autoload
 811 (defun diary-hebrew-date ()
 812   "Hebrew calendar equivalent of date diary entry."
 813   (format "Hebrew date (until sunset): %s" (calendar-hebrew-date-string date)))
 814
 815 (defvar entry)
 816 (declare-function diary-ordinal-suffix "diary-lib" (n))
 817
 818 ;;;###diary-autoload
 819 (defun diary-hebrew-birthday (month day year &optional after-sunset)
 820   "Hebrew birthday diary entry.
 821 Entry applies if date is birthdate (MONTH DAY YEAR), or the day before.
 822 The order of the input parameters changes according to
 823 `calendar-date-style' (e.g. to DAY MONTH YEAR in the European style).
 824
 825 Assumes the associated diary entry is the name of the person.
 826
 827 Although the date of birth is specified by the *civil* calendar,
 828 this function determines the proper Hebrew calendar birthday.
 829 If the optional argument AFTER-SUNSET is non-nil, this means the
 830 birth occurred after local sunset on the given civil date.
 831 In this case, the following civil date corresponds to the Hebrew birthday."
 832   (let* ((h-date (calendar-hebrew-from-absolute
 833                   (+ (calendar-absolute-from-gregorian
 834                       (diary-make-date month day year))
 835                      (if after-sunset 1 0))))
 836          (h-year (calendar-extract-year h-date))     ; birth-day
 837          (d (calendar-absolute-from-gregorian date)) ; today
 838          (h-yr (calendar-extract-year (calendar-hebrew-from-absolute d)))
 839          (age (- h-yr h-year))          ; current H year - birth H-year
 840          (b-date (calendar-hebrew-birthday h-date h-yr)))
 841     (and (> age 0) (memq b-date (list d (1+ d)))
 842          (format "%s's %d%s Hebrew birthday%s" entry age
 843                  (diary-ordinal-suffix age)
 844                  (if (= b-date d) "" " (evening)")))))
 845
 846 ;;;###diary-autoload
 847 (defun diary-hebrew-omer (&optional mark)
 848   "Omer count diary entry.
 849 Entry applies if date is within 50 days after Passover.
 850
 851 An optional parameter MARK specifies a face or single-character string to
 852 use when highlighting the day in the calendar."
 853   (let* ((passover
 854           (calendar-hebrew-to-absolute
 855            (list 1 15 (+ (calendar-extract-year date) 3760))))
 856          (omer (- (calendar-absolute-from-gregorian date) passover))
 857          (week (/ omer 7))
 858          (day (% omer 7)))
 859     (if (and (> omer 0) (< omer 50))
 860         (cons mark
 861               (format "Day %d%s of the omer (until sunset)"
 862                       omer
 863                       (if (zerop week)
 864                           ""
 865                         (format ", that is, %d week%s%s"
 866                                 week
 867                                 (if (= week 1) "" "s")
 868                                 (if (zerop day)
 869                                     ""
 870                                   (format " and %d day%s"
 871                                           day (if (= day 1) "" "s"))))))))))
 872 ;;;###diary-autoload
 873 (define-obsolete-function-alias 'diary-omer 'diary-hebrew-omer "23.1")
 874
 875 (autoload 'diary-make-date "diary-lib")
 876
 877 (declare-function diary-ordinal-suffix "diary-lib" (n))
 878
 879 ;;;###diary-autoload
 880 (defun diary-hebrew-yahrzeit (death-month death-day death-year
 881                                           &optional mark after-sunset)
 882   "Yahrzeit diary entry--entry applies if date is Yahrzeit or the day before.
 883 Parameters are DEATH-MONTH, DEATH-DAY, DEATH-YEAR; the diary
 884 entry is assumed to be the name of the person.  Although the date
 885 of death is specified by the civil calendar, the proper Hebrew
 886 calendar Yahrzeit is determined.
 887
 888 If the death occurred after local sunset on the given civil date,
 889 the following civil date corresponds to the Hebrew date of
 890 death--set the optional parameter AFTER-SUNSET non-nil in this case.
 891
 892 The order of the input parameters changes according to `calendar-date-style'
 893 \(e.g. to DEATH-DAY, DEATH-MONTH, DEATH-YEAR in the European style).
 894
 895 An optional parameter MARK specifies a face or single-character string to
 896 use when highlighting the day in the calendar."
 897   (let* ((h-date (calendar-hebrew-from-absolute
 898                   (+ (calendar-absolute-from-gregorian
 899                       (diary-make-date death-month death-day death-year))
 900                      (if after-sunset 1 0))))
 901          (h-year (calendar-extract-year h-date))
 902          (d (calendar-absolute-from-gregorian date))
 903          (yr (calendar-extract-year (calendar-hebrew-from-absolute d)))
 904          (diff (- yr h-year))
 905          (y (calendar-hebrew-yahrzeit h-date yr)))
 906     (if (and (> diff 0) (or (= y d) (= y (1+ d))))
 907         (cons mark
 908               (format "Yahrzeit of %s%s: %d%s anniversary"
 909                       entry
 910                       (if (= y d) "" " (evening)")
 911                       diff
 912                       (diary-ordinal-suffix diff))))))
 913
 914 ;;;###diary-autoload
 915 (define-obsolete-function-alias 'diary-yahrzeit 'diary-hebrew-yahrzeit "23.1")
 916
 917 ;;;###diary-autoload
 918 (defun diary-hebrew-rosh-hodesh (&optional mark)
 919   "Rosh Hodesh diary entry.
 920 Entry applies if date is Rosh Hodesh, the day before, or the Saturday before.
 921
 922 An optional parameter MARK specifies a face or single-character string to
 923 use when highlighting the day in the calendar."
 924   (let* ((d (calendar-absolute-from-gregorian date))
 925          (h-date (calendar-hebrew-from-absolute d))
 926          (h-month (calendar-extract-month h-date))
 927          (h-day (calendar-extract-day h-date))
 928          (h-year (calendar-extract-year h-date))
 929          (leap-year (calendar-hebrew-leap-year-p h-year))
 930          (last-day (calendar-hebrew-last-day-of-month h-month h-year))
 931          (h-month-names
 932           (if leap-year
 933               calendar-hebrew-month-name-array-leap-year
 934             calendar-hebrew-month-name-array-common-year))
 935          (this-month (aref h-month-names (1- h-month)))
 936          (h-yesterday (calendar-extract-day
 937                        (calendar-hebrew-from-absolute (1- d)))))
 938     (if (or (= h-day 30) (and (= h-day 1) (/= h-month 7)))
 939         (cons mark
 940               (format
 941                "Rosh Hodesh %s"
 942                (if (= h-day 30)
 943                    (format
 944                     "%s (first day)"
 945                     ;; Next month must be in the same year since this
 946                     ;; month can't be the last month of the year since
 947                     ;; it has 30 days
 948                     (aref h-month-names h-month))
 949                  (if (= h-yesterday 30)
 950                      (format "%s (second day)" this-month)
 951                    this-month))))
 952       (if (= (% d 7) 6)        ; Saturday--check for Shabbat Mevarchim
 953           (cond ((and (> h-day 22) (/= h-month 6) (= 29 last-day))
 954                  (cons mark
 955                        (format "Mevarchim Rosh Hodesh %s (%s)"
 956                                (aref h-month-names
 957                                      (if (= h-month
 958                                             (calendar-hebrew-last-month-of-year
 959                                              h-year))
 960                                          0 h-month))
 961                                (aref calendar-day-name-array (- 29 h-day)))))
 962                 ((and (< h-day 30) (> h-day 22) (= 30 last-day))
 963                  (cons mark
 964                        (format "Mevarchim Rosh Hodesh %s (%s-%s)"
 965                                (aref h-month-names h-month)
 966                                (if (= h-day 29)
 967                                    "tomorrow"
 968                                  (aref calendar-day-name-array (- 29 h-day)))
 969                                (aref calendar-day-name-array
 970                                      (% (- 30 h-day) 7))))))
 971         (if (and (= h-day 29) (/= h-month 6))
 972             (cons mark
 973                   (format "Erev Rosh Hodesh %s"
 974                           (aref h-month-names
 975                                 (if (= h-month
 976                                        (calendar-hebrew-last-month-of-year
 977                                         h-year))
 978                                     0 h-month)))))))))
 979 ;;;###diary-autoload
 980 (define-obsolete-function-alias 'diary-rosh-hodesh
 981   'diary-hebrew-rosh-hodesh "23.1")
 982
 983 (defconst calendar-hebrew-parashiot-names
 984   ["Bereshith"   "Noah"      "Lech L'cha" "Vayera"    "Hayei Sarah" "Toledoth"
 985    "Vayetze"     "Vayishlah" "Vayeshev"   "Mikketz"   "Vayiggash"   "Vayhi"
 986    "Shemoth"     "Vaera"     "Bo"         "Beshallah" "Yithro"      "Mishpatim"
 987    "Terumah"     "Tetzavveh" "Ki Tissa"   "Vayakhel"  "Pekudei"     "Vayikra"
 988    "Tzav"        "Shemini"   "Tazria"     "Metzora"   "Aharei Moth" "Kedoshim"
 989    "Emor"        "Behar"     "Behukkotai" "Bemidbar"  "Naso"      "Behaalot'cha"
 990    "Shelah L'cha" "Korah"    "Hukkath"    "Balak"     "Pinhas"      "Mattoth"
 991    "Masei"       "Devarim"   "Vaethanan"  "Ekev"      "Reeh"        "Shofetim"
 992    "Ki Tetze"    "Ki Tavo"   "Nitzavim"   "Vayelech"  "Haazinu"]
 993   "The names of the parashiot in the Torah.")
 994
 995 (defun calendar-hebrew-parasha-name (p)
 996   "Name(s) corresponding to parasha P."
 997   (if (arrayp p)                        ; combined parasha
 998       (format "%s/%s"
 999               (aref calendar-hebrew-parashiot-names (aref p 0))
1000               (aref calendar-hebrew-parashiot-names (aref p 1)))
1001     (aref calendar-hebrew-parashiot-names p)))
1002
1003 ;; Following 14 constants are used in diary-parasha (intern).
1004
1005 ;; The seven ordinary year types (keviot).
1006 (defconst calendar-hebrew-year-Saturday-incomplete-Sunday
1007   [nil 52 nil nil 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 [21 22]
1008        23 24 nil 25 [26 27] [28 29] 30 [31 32] 33 34 35 36 37 38 39 40 [41 42]
1009        43 44 45 46 47 48 49 50]
1010   "The structure of the parashiot.
1011 Hebrew year starts on Saturday, is `incomplete' (Heshvan and Kislev each have
1012 29 days), and has Passover start on Sunday.")
1013
1014 (defconst calendar-hebrew-year-Saturday-complete-Tuesday
1015   [nil 52 nil nil 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 [21 22]
1016        23 24 nil 25 [26 27] [28 29] 30 [31 32] 33 34 35 36 37 38 39 40 [41 42]
1017        43 44 45 46 47 48 49 [50 51]]
1018   "The structure of the parashiot.
1019 Hebrew year that starts on Saturday, is `complete' (Heshvan and Kislev each
1020 have 30 days), and has Passover start on Tuesday.")
1021
1022 (defconst calendar-hebrew-year-Monday-incomplete-Tuesday
1023   [51 52 nil 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 [21 22]
1024       23 24 nil 25 [26 27] [28 29] 30 [31 32] 33 34 35 36 37 38 39 40 [41 42]
1025       43 44 45 46 47 48 49 [50 51]]
1026   "The structure of the parashiot.
1027 Hebrew year that starts on Monday, is `incomplete' (Heshvan and Kislev each
1028 have 29 days), and has Passover start on Tuesday.")
1029
1030 (defconst calendar-hebrew-year-Monday-complete-Thursday
1031   [51 52 nil 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 [21 22]
1032       23 24 nil 25 [26 27] [28 29] 30 [31 32] 33 (nil . 34) (34 . 35) (35 . 36)
1033       (36 . 37) (37 . 38) ([38 39] . 39) 40 [41 42] 43 44 45 46 47 48 49 [50 51]]
1034   "The structure of the parashiot.
1035 Hebrew year that starts on Monday, is `complete' (Heshvan and Kislev each have
1036 30 days), and has Passover start on Thursday.")
1037
1038 (defconst calendar-hebrew-year-Tuesday-regular-Thursday
1039   [51 52 nil 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 [21 22]
1040       23 24 nil 25 [26 27] [28 29] 30 [31 32] 33 (nil . 34) (34 . 35) (35 . 36)
1041       (36 . 37) (37 . 38) ([38 39] . 39) 40 [41 42] 43 44 45 46 47 48 49 [50 51]]
1042   "The structure of the parashiot.
1043 Hebrew year that starts on Tuesday, is `regular' (Heshvan has 29 days and
1044 Kislev has 30 days), and has Passover start on Thursday.")
1045
1046 (defconst calendar-hebrew-year-Thursday-regular-Saturday
1047   [52 nil nil 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 [21 22] 23
1048       24 nil (nil . 25) (25 . [26 27]) ([26 27] . [28 29]) ([28 29] . 30)
1049       (30 . 31) ([31 32] . 32) 33 34 35 36 37 38 39 40 [41 42] 43 44 45 46 47 48
1050       49 50]
1051   "The structure of the parashiot.
1052 Hebrew year that starts on Thursday, is `regular' (Heshvan has 29 days and
1053 Kislev has 30 days), and has Passover start on Saturday.")
1054
1055 (defconst calendar-hebrew-year-Thursday-complete-Sunday
1056   [52 nil nil 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
1057       23 24 nil 25 [26 27] [28 29] 30 [31 32] 33 34 35 36 37 38 39 40 [41 42]
1058       43 44 45 46 47 48 49 50]
1059   "The structure of the parashiot.
1060 Hebrew year that starts on Thursday, is `complete' (Heshvan and Kislev each
1061 have 30 days), and has Passover start on Sunday.")
1062
1063 ;; The seven leap year types (keviot).
1064 (defconst calendar-hebrew-year-Saturday-incomplete-Tuesday
1065   [nil 52 nil nil 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
1066        23 24 25 26 27 nil 28 29 30 31 32 33 34 35 36 37 38 39 40 [41 42]
1067        43 44 45 46 47 48 49 [50 51]]
1068   "The structure of the parashiot.
1069 Hebrew year that starts on Saturday, is `incomplete' (Heshvan and Kislev each
1070 have 29 days), and has Passover start on Tuesday.")
1071
1072 (defconst calendar-hebrew-year-Saturday-complete-Thursday
1073   [nil 52 nil nil 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
1074        23 24 25 26 27 nil 28 29 30 31 32 33 (nil . 34) (34 . 35) (35 . 36)
1075        (36 . 37) (37 . 38) ([38 39] . 39) 40 [41 42] 43 44 45 46 47 48 49 [50 51]]
1076   "The structure of the parashiot.
1077 Hebrew year that starts on Saturday, is `complete' (Heshvan and Kislev each
1078 have 30 days), and has Passover start on Thursday.")
1079
1080 (defconst calendar-hebrew-year-Monday-incomplete-Thursday
1081   [51 52 nil 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
1082       23 24 25 26 27 nil 28 29 30 31 32 33 (nil . 34) (34 . 35) (35 . 36)
1083       (36 . 37) (37 . 38) ([38 39] . 39) 40 [41 42] 43 44 45 46 47 48 49 [50 51]]
1084   "The structure of the parashiot.
1085 Hebrew year that starts on Monday, is `incomplete' (Heshvan and Kislev each
1086 have 29 days), and has Passover start on Thursday.")
1087
1088 (defconst calendar-hebrew-year-Monday-complete-Saturday
1089   [51 52 nil 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
1090       23 24 25 26 27 nil (nil . 28) (28 . 29) (29 . 30) (30 . 31) (31 . 32)
1091       (32 . 33) (33 . 34) (34 . 35) (35 . 36) (36 . 37) (37 . 38) (38 . 39)
1092       (39 . 40) (40 . 41) ([41 42] . 42) 43 44 45 46 47 48 49 50]
1093   "The structure of the parashiot.
1094 Hebrew year that starts on Monday, is `complete' (Heshvan and Kislev each have
1095 30 days), and has Passover start on Saturday.")
1096
1097 (defconst calendar-hebrew-year-Tuesday-regular-Saturday
1098   [51 52 nil 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
1099       23 24 25 26 27 nil (nil . 28) (28 . 29) (29 . 30) (30 . 31) (31 . 32)
1100       (32 . 33) (33 . 34) (34 . 35) (35 . 36) (36 . 37) (37 . 38) (38 . 39)
1101       (39 . 40) (40 . 41) ([41 42] . 42) 43 44 45 46 47 48 49 50]
1102   "The structure of the parashiot.
1103 Hebrew year that starts on Tuesday, is `regular' (Heshvan has 29 days and
1104 Kislev has 30 days), and has Passover start on Saturday.")
1105
1106 (defconst calendar-hebrew-year-Thursday-incomplete-Sunday
1107   [52 nil nil 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
1108       23 24 25 26 27 28 nil 29 30 31 32 33 34 35 36 37 38 39 40 41 42
1109       43 44 45 46 47 48 49 50]
1110   "The structure of the parashiot.
1111 Hebrew year that starts on Thursday, is `incomplete' (Heshvan and Kislev both
1112 have 29 days), and has Passover start on Sunday.")
1113
1114 (defconst calendar-hebrew-year-Thursday-complete-Tuesday
1115   [52 nil nil 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
1116       23 24 25 26 27 28 nil 29 30 31 32 33 34 35 36 37 38 39 40 41 42
1117       43 44 45 46 47 48 49 [50 51]]
1118   "The structure of the parashiot.
1119 Hebrew year that starts on Thursday, is `complete' (Heshvan and Kislev both
1120 have 30 days), and has Passover start on Tuesday.")
1121
1122 ;;;###diary-autoload
1123 (defun diary-hebrew-parasha (&optional mark)
1124   "Parasha diary entry--entry applies if date is a Saturday.
1125 An optional parameter MARK specifies a face or single-character string to
1126 use when highlighting the day in the calendar."
1127   (let ((d (calendar-absolute-from-gregorian date)))
1128     (if (= (% d 7) 6)                   ; Saturday
1129         (let* ((h-year (calendar-extract-year
1130                         (calendar-hebrew-from-absolute d)))
1131                (rosh-hashanah
1132                 (calendar-hebrew-to-absolute (list 7 1 h-year)))
1133                (passover
1134                 (calendar-hebrew-to-absolute (list 1 15 h-year)))
1135                (rosh-hashanah-day
1136                 (aref calendar-day-name-array (% rosh-hashanah 7)))
1137                (passover-day
1138                 (aref calendar-day-name-array (% passover 7)))
1139                (long-h (calendar-hebrew-long-heshvan-p h-year))
1140                (short-k (calendar-hebrew-short-kislev-p h-year))
1141                (type (cond ((and long-h (not short-k)) "complete")
1142                            ((and (not long-h) short-k) "incomplete")
1143                            (t "regular")))
1144                (year-format
1145                 (symbol-value
1146                  (intern (format "calendar-hebrew-year-%s-%s-%s" ; keviah
1147                                  rosh-hashanah-day type passover-day))))
1148                (first-saturday            ; of Hebrew year
1149                 (calendar-dayname-on-or-before 6 (+ 6 rosh-hashanah)))
1150                (saturday             ; which Saturday of the Hebrew year
1151                 (/ (- d first-saturday) 7))
1152                (parasha (aref year-format saturday)))
1153           (if parasha
1154               (cons mark
1155                     (format
1156                      "Parashat %s"
1157                      (if (listp parasha) ; Israel differs from diaspora
1158                          (if (car parasha)
1159                              (format "%s (diaspora), %s (Israel)"
1160                                      (calendar-hebrew-parasha-name
1161                                       (car parasha))
1162                                      (calendar-hebrew-parasha-name
1163                                       (cdr parasha)))
1164                            (format "%s (Israel)"
1165                                    (calendar-hebrew-parasha-name
1166                                     (cdr parasha))))
1167                        (calendar-hebrew-parasha-name parasha)))))))))
1168
1169 (define-obsolete-function-alias 'diary-parasha 'diary-hebrew-parasha "23.1")
1170
1171
1172 (declare-function solar-setup "solar" ())
1173 (declare-function solar-sunrise-sunset "solar" (date))
1174 (defvar calendar-latitude)
1175 (defvar calendar-longitude)
1176 (defvar calendar-time-zone)
1177
1178
1179 ;; To be called from diary-list-sexp-entries, where DATE is bound.
1180 ;;;###diary-autoload
1181 (defun diary-hebrew-sabbath-candles (&optional mark)
1182   "Local time of candle lighting diary entry--applies if date is a Friday.
1183 No diary entry if there is no sunset on that date.  Uses
1184 `diary-hebrew-sabbath-candles-minutes'.
1185
1186 An optional parameter MARK specifies a face or single-character string to
1187 use when highlighting the day in the calendar."
1188   (require 'solar)
1189   (or (and calendar-latitude calendar-longitude calendar-time-zone)
1190       (solar-setup))
1191   (if (= (% (calendar-absolute-from-gregorian date) 7) 5) ; Friday
1192       (let ((sunset (cadr (solar-sunrise-sunset date))))
1193         (if sunset
1194             (cons mark (format
1195                         "%s Sabbath candle lighting"
1196                         (apply 'solar-time-string
1197                                (cons (- (car sunset)
1198                                         (/ diary-hebrew-sabbath-candles-minutes
1199                                            60.0))
1200                                      (cdr sunset)))))))))
1201
1202 ;;;###diary-autoload
1203 (define-obsolete-function-alias 'diary-sabbath-candles
1204   'diary-hebrew-sabbath-candles "23.1")
1205
1206
1207 (provide 'cal-hebrew)
1208
1209 ;;; cal-hebrew.el ends here