lisp/calendar/cal-hebrew.el

   1 ;;; cal-hebrew.el --- calendar functions for the Hebrew calendar
   2
   3 ;; Copyright (C) 1995, 1997, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
   4 ;;   2008, 2009, 2010  Free Software Foundation, Inc.
   5
   6 ;; Author: Nachum Dershowitz <nachum@cs.uiuc.edu>
   7 ;;         Edward M. Reingold <reingold@cs.uiuc.edu>
   8 ;; Maintainer: Glenn Morris <rgm@gnu.org>
   9 ;; Keywords: calendar
  10 ;; Human-Keywords: Hebrew calendar, calendar, diary
  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                   (if (= (% abs-r-h 7) 4) (+ abs-r-h 3) (+ abs-r-h 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           (list
 457            (list (calendar-gregorian-from-absolute
 458                   (calendar-dayname-on-or-before 6 (- abs-p 43)))
 459                  "Shabbat Shekalim")
 460            (list (calendar-gregorian-from-absolute
 461                   (calendar-dayname-on-or-before 6 (- abs-p 30)))
 462                  "Shabbat Zachor")
 463            (list (calendar-gregorian-from-absolute
 464                   (if (= (% abs-p 7) 2) (- abs-p 33) (- abs-p 31)))
 465                  "Fast of Esther")
 466            (list (calendar-gregorian-from-absolute (- abs-p 31))
 467                  "Erev Purim")
 468            (list (calendar-gregorian-from-absolute (- abs-p 30))
 469                  "Purim")
 470            (list (calendar-gregorian-from-absolute
 471                   (if (zerop (% abs-p 7)) (- abs-p 28) (- abs-p 29)))
 472                  "Shushan Purim")
 473            (list (calendar-gregorian-from-absolute
 474                   (- (calendar-dayname-on-or-before 6 (- abs-p 14)) 7))
 475                  "Shabbat Parah")
 476            (list (calendar-gregorian-from-absolute
 477                   (calendar-dayname-on-or-before 6 (- abs-p 14)))
 478                  "Shabbat HaHodesh")
 479            (list (calendar-gregorian-from-absolute
 480                   (calendar-dayname-on-or-before 6 (1- abs-p)))
 481                  "Shabbat HaGadol")
 482            (list (calendar-gregorian-from-absolute (1- abs-p))
 483                  "Erev Passover")
 484            (list (calendar-gregorian-from-absolute (1+ abs-p))
 485                  "Passover (second day)")
 486            (list (calendar-gregorian-from-absolute (+ abs-p 2))
 487                  "Hol Hamoed Passover (first day)")
 488            (list (calendar-gregorian-from-absolute (+ abs-p 3))
 489                  "Hol Hamoed Passover (second day)")
 490            (list (calendar-gregorian-from-absolute (+ abs-p 4))
 491                  "Hol Hamoed Passover (third day)")
 492            (list (calendar-gregorian-from-absolute (+ abs-p 5))
 493                  "Hol Hamoed Passover (fourth day)")
 494            (list (calendar-gregorian-from-absolute (+ abs-p 6))
 495                  "Passover (seventh day)")
 496            (list (calendar-gregorian-from-absolute (+ abs-p 7))
 497                  "Passover (eighth day)")
 498            (list (calendar-gregorian-from-absolute
 499                   (if (zerop (% (+ abs-p 12) 7))
 500                       (+ abs-p 13)
 501                     (+ abs-p 12)))
 502                  "Yom HaShoah")
 503            (list (calendar-gregorian-from-absolute
 504                   (if (zerop (% abs-p 7))
 505                       (+ abs-p 18)
 506                     (if (= (% abs-p 7) 6)
 507                         (+ abs-p 19)
 508                       (if (= (% abs-p 7) 2)
 509                           (+ abs-p 21)
 510                         (+ abs-p 20)))))
 511                  "Yom HaAtzma'ut")
 512            (list (calendar-gregorian-from-absolute (+ abs-p 33))
 513                  "Lag BaOmer")
 514            (list (calendar-gregorian-from-absolute (+ abs-p 43))
 515                  "Yom Yerushalaim")
 516            (list (calendar-gregorian-from-absolute (+ abs-p 49))
 517                  "Erev Shavuot")
 518            (list (calendar-gregorian-from-absolute (+ abs-p 51))
 519                  "Shavuot (second day)"))))))))
 520
 521 ;;;###holiday-autoload
 522 (define-obsolete-function-alias 'holiday-passover-etc
 523   'holiday-hebrew-passover "23.1")
 524
 525 ;;;###holiday-autoload
 526 (defun holiday-hebrew-tisha-b-av ()
 527   "List of dates around Tisha B'Av, as visible in calendar window."
 528   (when (memq displayed-month '(5 6 7 8 9))
 529     (let ((abs-t-a (calendar-hebrew-to-absolute
 530                     (list 5 9 (+ displayed-year 3760)))))
 531       (holiday-filter-visible-calendar
 532        (list
 533         (list (calendar-gregorian-from-absolute
 534                (if (= (% abs-t-a 7) 6) (- abs-t-a 20) (- abs-t-a 21)))
 535               "Tzom Tammuz")
 536         (list (calendar-gregorian-from-absolute
 537                (calendar-dayname-on-or-before 6 abs-t-a))
 538               "Shabbat Hazon")
 539         (list (calendar-gregorian-from-absolute
 540                (if (= (% abs-t-a 7) 6) (1+ abs-t-a) abs-t-a))
 541               "Tisha B'Av")
 542         (list (calendar-gregorian-from-absolute
 543                (calendar-dayname-on-or-before 6 (+ abs-t-a 7)))
 544               "Shabbat Nahamu"))))))
 545
 546 ;;;###holiday-autoload
 547 (define-obsolete-function-alias 'holiday-tisha-b-av-etc
 548   'holiday-hebrew-tisha-b-av "23.1")
 549
 550 (autoload 'holiday-julian "cal-julian")
 551
 552 ;;;###holiday-autoload
 553 (defun holiday-hebrew-misc ()
 554   "Miscellaneous Hebrew holidays, if visible in calendar window.
 555 Includes: Tal Umatar, Tzom Teveth, Tu B'Shevat, Shabbat Shirah, and
 556 Kiddush HaHamah."
 557   (let ((m displayed-month)
 558         (y displayed-year)
 559         year h-year s-s)
 560     (append
 561      (holiday-julian
 562       11
 563       (progn
 564         (calendar-increment-month m y -1)
 565         (setq year (calendar-extract-year
 566                     (calendar-julian-from-absolute
 567                      (calendar-absolute-from-gregorian (list m 1 y)))))
 568         (if (zerop (% (1+ year) 4))
 569             22
 570           21)) "\"Tal Umatar\" (evening)")
 571      (holiday-hebrew
 572       10
 573       (progn
 574         (setq h-year (calendar-extract-year
 575                       (calendar-hebrew-from-absolute
 576                        (calendar-absolute-from-gregorian
 577                         (list displayed-month 28 displayed-year)))))
 578         (if (= 6 (% (calendar-hebrew-to-absolute (list 10 10 h-year))
 579                     7))
 580             11 10))
 581       "Tzom Teveth")
 582      (holiday-hebrew 11 15 "Tu B'Shevat")
 583      (holiday-hebrew
 584       11
 585       (progn
 586         (setq m displayed-month
 587               y displayed-year
 588               h-year (progn
 589                        (calendar-increment-month m y 1)
 590                        (calendar-extract-year
 591                         (calendar-hebrew-from-absolute
 592                          (calendar-absolute-from-gregorian
 593                           (list m (calendar-last-day-of-month m y) y)))))
 594               s-s
 595               (calendar-hebrew-from-absolute
 596                (if (= 6
 597                       (% (calendar-hebrew-to-absolute
 598                           (list 7 1 h-year))
 599                          7))
 600                    (calendar-dayname-on-or-before
 601                     6 (calendar-hebrew-to-absolute
 602                        (list 11 17 h-year)))
 603                  (calendar-dayname-on-or-before
 604                   6 (calendar-hebrew-to-absolute
 605                      (list 11 16 h-year))))))
 606         (calendar-extract-day s-s))
 607       "Shabbat Shirah")
 608      (and (progn
 609             (setq m displayed-month
 610                   y displayed-year
 611                   year (progn
 612                          (calendar-increment-month m y -1)
 613                          (calendar-extract-year
 614                           (calendar-julian-from-absolute
 615                            (calendar-absolute-from-gregorian (list m 1 y))))))
 616             (= 21 (% year 28)))
 617           (holiday-julian 3 26 "Kiddush HaHamah")))))
 618
 619
 620 (autoload 'diary-list-entries-1 "diary-lib")
 621
 622 ;;;###diary-autoload
 623 (defun diary-hebrew-list-entries ()
 624   "Add any Hebrew date entries from the diary file to `diary-entries-list'.
 625 Hebrew date diary entries must be prefaced by `diary-hebrew-entry-symbol'
 626 \(normally an `H').  The same diary date forms govern the style
 627 of the Hebrew calendar entries, except that the Hebrew month
 628 names cannot be abbreviated.  The Hebrew months are numbered
 629 from 1 to 13 with Nisan being 1, 12 being Adar I and 13 being
 630 Adar II; you must use `Adar I' if you want Adar of a common
 631 Hebrew year.  If a Hebrew date diary entry begins with
 632 `diary-nonmarking-symbol', the entry will appear in the diary
 633 listing, but will not be marked in the calendar.  This function
 634 is provided for use with `diary-nongregorian-listing-hook'."
 635   (diary-list-entries-1 calendar-hebrew-month-name-array-leap-year
 636                         diary-hebrew-entry-symbol
 637                         'calendar-hebrew-from-absolute))
 638 ;;;###diary-autoload
 639 (define-obsolete-function-alias 'list-hebrew-diary-entries
 640   'diary-hebrew-list-entries "23.1")
 641
 642 (autoload 'calendar-mark-complex "diary-lib")
 643
 644 ;;;###diary-autoload
 645 (defun calendar-hebrew-mark-date-pattern (month day year &optional color)
 646   "Mark dates in calendar window that conform to Hebrew date MONTH/DAY/YEAR.
 647 A value of 0 in any position is a wildcard.  Optional argument COLOR is
 648 passed to `calendar-mark-visible-date' as MARK."
 649   ;; FIXME not the same as the Bahai and Islamic cases, so can't use
 650   ;; calendar-mark-1.
 651   (with-current-buffer calendar-buffer
 652     (if (and (not (zerop month)) (not (zerop day)))
 653         (if (not (zerop year))
 654             ;; Fully specified Hebrew date.
 655             (let ((date (calendar-gregorian-from-absolute
 656                          (calendar-hebrew-to-absolute
 657                           (list month day year)))))
 658               (if (calendar-date-is-visible-p date)
 659                   (calendar-mark-visible-date date color)))
 660           ;; Month and day in any year.
 661           (let ((gdate (calendar-hebrew-date-is-visible-p month day)))
 662             (if gdate (calendar-mark-visible-date gdate color))))
 663       (calendar-mark-complex month day year
 664                              'calendar-hebrew-from-absolute color))))
 665
 666 ;;;###diary-autoload
 667 (define-obsolete-function-alias 'mark-hebrew-calendar-date-pattern
 668   'calendar-hebrew-mark-date-pattern "23.1")
 669
 670 (autoload 'diary-mark-entries-1 "diary-lib")
 671
 672 ;;;###diary-autoload
 673 (defun diary-hebrew-mark-entries ()
 674   "Mark days in the calendar window that have Hebrew date diary entries.
 675 Marks each entry in `diary-file' (or included files) visible in the calendar
 676 window.  See `list-hebrew-diary-entries' for more information."
 677   (diary-mark-entries-1 'calendar-hebrew-mark-date-pattern
 678                         calendar-hebrew-month-name-array-leap-year
 679                         diary-hebrew-entry-symbol
 680                         'calendar-hebrew-from-absolute))
 681
 682 ;;;###diary-autoload
 683 (define-obsolete-function-alias 'mark-hebrew-diary-entries
 684   'diary-hebrew-mark-entries "23.1")
 685
 686 (autoload 'diary-insert-entry-1 "diary-lib")
 687
 688 ;;;###cal-autoload
 689 (defun diary-hebrew-insert-entry (arg)
 690   "Insert a diary entry for the Hebrew date at point.
 691 Prefix argument ARG makes the entry nonmarking."
 692   (interactive "P")
 693   (diary-insert-entry-1 nil arg calendar-hebrew-month-name-array-leap-year
 694                         diary-hebrew-entry-symbol
 695                         'calendar-hebrew-from-absolute))
 696
 697 ;;;###diary-autoload
 698 (define-obsolete-function-alias 'insert-hebrew-diary-entry
 699   'diary-hebrew-insert-entry "23.1")
 700
 701 ;;;###cal-autoload
 702 (defun diary-hebrew-insert-monthly-entry (arg)
 703   "Insert a monthly diary entry.
 704 For the day of the Hebrew month corresponding to the date indicated by point.
 705 Prefix argument ARG makes the entry nonmarking."
 706   (interactive "P")
 707   (diary-insert-entry-1 'monthly arg calendar-hebrew-month-name-array-leap-year
 708                         diary-hebrew-entry-symbol
 709                         'calendar-hebrew-from-absolute))
 710 ;;;###diary-autoload
 711 (define-obsolete-function-alias 'insert-monthly-hebrew-diary-entry
 712   'diary-hebrew-insert-monthly-entry "23.1")
 713
 714 ;;;###cal-autoload
 715 (defun diary-hebrew-insert-yearly-entry (arg)
 716   "Insert an annual diary entry.
 717 For the day of the Hebrew year corresponding to the date indicated by point.
 718 Prefix argument ARG makes the entry nonmarking."
 719   (interactive "P")
 720   (diary-insert-entry-1 'yearly arg calendar-hebrew-month-name-array-leap-year
 721                         diary-hebrew-entry-symbol
 722                         'calendar-hebrew-from-absolute))
 723 ;;;###diary-autoload
 724 (define-obsolete-function-alias 'insert-yearly-hebrew-diary-entry
 725   'diary-hebrew-insert-yearly-entry "23.1")
 726
 727 ;;;###autoload
 728 (defun calendar-hebrew-list-yahrzeits (death-date start-year end-year)
 729   "List Yahrzeit dates for *Gregorian* DEATH-DATE from START-YEAR to END-YEAR.
 730 When called interactively from the calendar window, the date of death is taken
 731 from the cursor position."
 732   (interactive
 733    (let* ((death-date
 734            (if (equal (current-buffer) (get-buffer calendar-buffer))
 735                (calendar-cursor-to-date)
 736              (let* ((today (calendar-current-date))
 737                     (year (calendar-read
 738                            "Year of death (>0): "
 739                            (lambda (x) (> x 0))
 740                            (number-to-string (calendar-extract-year today))))
 741                     (month-array calendar-month-name-array)
 742                     (completion-ignore-case t)
 743                     (month (cdr (assoc-string
 744                                  (completing-read
 745                                   "Month of death (name): "
 746                                   (mapcar 'list (append month-array nil))
 747                                   nil t)
 748                                  (calendar-make-alist month-array 1) t)))
 749                     (last (calendar-last-day-of-month month year))
 750                     (day (calendar-read
 751                           (format "Day of death (1-%d): " last)
 752                           (lambda (x) (and (< 0 x) (<= x last))))))
 753                (list month day year))))
 754           (death-year (calendar-extract-year death-date))
 755           (start-year (calendar-read
 756                        (format "Starting year of Yahrzeit table (>%d): "
 757                                death-year)
 758                        (lambda (x) (> x death-year))
 759                        (number-to-string (1+ death-year))))
 760           (end-year (calendar-read
 761                      (format "Ending year of Yahrzeit table (>=%d): "
 762                              start-year)
 763                      (lambda (x) (>= x start-year)))))
 764      (list death-date start-year end-year)))
 765   (message "Computing Yahrzeits...")
 766   (let* ((h-date (calendar-hebrew-from-absolute
 767                   (calendar-absolute-from-gregorian death-date)))
 768          (h-month (calendar-extract-month h-date))
 769          (h-day (calendar-extract-day h-date))
 770          (h-year (calendar-extract-year h-date))
 771          (i (1- start-year)))
 772     (calendar-in-read-only-buffer calendar-hebrew-yahrzeit-buffer
 773       (calendar-set-mode-line
 774        (format "Yahrzeit dates for %s = %s"
 775                (calendar-date-string death-date)
 776                (let ((calendar-month-name-array
 777                       (if (calendar-hebrew-leap-year-p h-year)
 778                           calendar-hebrew-month-name-array-leap-year
 779                         calendar-hebrew-month-name-array-common-year)))
 780                  (calendar-date-string h-date nil t))))
 781       (while (<= (setq i (1+ i)) end-year)
 782         (insert
 783          (calendar-date-string
 784           (calendar-gregorian-from-absolute
 785            (calendar-hebrew-yahrzeit
 786             h-date
 787             (calendar-extract-year
 788              (calendar-hebrew-from-absolute
 789               (calendar-absolute-from-gregorian (list 1 1 i))))))) "\n"))))
 790   (message "Computing Yahrzeits...done"))
 791
 792 ;;;###autoload
 793 (define-obsolete-function-alias 'list-yahrzeit-dates
 794   'calendar-hebrew-list-yahrzeits "23.1")
 795
 796 (defvar date)
 797
 798 ;; To be called from diary-list-sexp-entries, where DATE is bound.
 799 ;;;###diary-autoload
 800 (defun diary-hebrew-date ()
 801   "Hebrew calendar equivalent of date diary entry."
 802   (format "Hebrew date (until sunset): %s" (calendar-hebrew-date-string date)))
 803
 804 ;;;###diary-autoload
 805 (defun diary-hebrew-omer (&optional mark)
 806   "Omer count diary entry.
 807 Entry applies if date is within 50 days after Passover.
 808
 809 An optional parameter MARK specifies a face or single-character string to
 810 use when highlighting the day in the calendar."
 811   (let* ((passover
 812           (calendar-hebrew-to-absolute
 813            (list 1 15 (+ (calendar-extract-year date) 3760))))
 814          (omer (- (calendar-absolute-from-gregorian date) passover))
 815          (week (/ omer 7))
 816          (day (% omer 7)))
 817     (if (and (> omer 0) (< omer 50))
 818         (cons mark
 819               (format "Day %d%s of the omer (until sunset)"
 820                       omer
 821                       (if (zerop week)
 822                           ""
 823                         (format ", that is, %d week%s%s"
 824                                 week
 825                                 (if (= week 1) "" "s")
 826                                 (if (zerop day)
 827                                     ""
 828                                   (format " and %d day%s"
 829                                           day (if (= day 1) "" "s"))))))))))
 830 ;;;###diary-autoload
 831 (define-obsolete-function-alias 'diary-omer 'diary-hebrew-omer "23.1")
 832
 833 (defvar entry)
 834
 835 (autoload 'diary-make-date "diary-lib")
 836
 837 (declare-function diary-ordinal-suffix "diary-lib" (n))
 838
 839 ;;;###diary-autoload
 840 (defun diary-hebrew-yahrzeit (death-month death-day death-year &optional mark)
 841   "Yahrzeit diary entry--entry applies if date is Yahrzeit or the day before.
 842 Parameters are DEATH-MONTH, DEATH-DAY, DEATH-YEAR; the diary
 843 entry is assumed to be the name of the person.  Although the date
 844 of death is specified by the civil calendar, the proper Hebrew
 845 calendar Yahrzeit is determined.
 846
 847 The order of the input parameters changes according to `calendar-date-style'
 848 \(e.g. to DEATH-DAY, DEATH-MONTH, DEATH-YEAR in the European style).
 849
 850 An optional parameter MARK specifies a face or single-character string to
 851 use when highlighting the day in the calendar."
 852   (let* ((h-date (calendar-hebrew-from-absolute
 853                   (calendar-absolute-from-gregorian
 854                    (diary-make-date death-month death-day death-year))))
 855          (h-month (calendar-extract-month h-date))
 856          (h-day (calendar-extract-day h-date))
 857          (h-year (calendar-extract-year h-date))
 858          (d (calendar-absolute-from-gregorian date))
 859          (yr (calendar-extract-year (calendar-hebrew-from-absolute d)))
 860          (diff (- yr h-year))
 861          (y (calendar-hebrew-yahrzeit h-date yr)))
 862     (if (and (> diff 0) (or (= y d) (= y (1+ d))))
 863         (cons mark
 864               (format "Yahrzeit of %s%s: %d%s anniversary"
 865                       entry
 866                       (if (= y d) "" " (evening)")
 867                       diff
 868                       (diary-ordinal-suffix diff))))))
 869
 870 ;;;###diary-autoload
 871 (define-obsolete-function-alias 'diary-yahrzeit 'diary-hebrew-yahrzeit "23.1")
 872
 873 ;;;###diary-autoload
 874 (defun diary-hebrew-rosh-hodesh (&optional mark)
 875   "Rosh Hodesh diary entry.
 876 Entry applies if date is Rosh Hodesh, the day before, or the Saturday before.
 877
 878 An optional parameter MARK specifies a face or single-character string to
 879 use when highlighting the day in the calendar."
 880   (let* ((d (calendar-absolute-from-gregorian date))
 881          (h-date (calendar-hebrew-from-absolute d))
 882          (h-month (calendar-extract-month h-date))
 883          (h-day (calendar-extract-day h-date))
 884          (h-year (calendar-extract-year h-date))
 885          (leap-year (calendar-hebrew-leap-year-p h-year))
 886          (last-day (calendar-hebrew-last-day-of-month h-month h-year))
 887          (h-month-names
 888           (if leap-year
 889               calendar-hebrew-month-name-array-leap-year
 890             calendar-hebrew-month-name-array-common-year))
 891          (this-month (aref h-month-names (1- h-month)))
 892          (h-yesterday (calendar-extract-day
 893                        (calendar-hebrew-from-absolute (1- d)))))
 894     (if (or (= h-day 30) (and (= h-day 1) (/= h-month 7)))
 895         (cons mark
 896               (format
 897                "Rosh Hodesh %s"
 898                (if (= h-day 30)
 899                    (format
 900                     "%s (first day)"
 901                     ;; Next month must be in the same year since this
 902                     ;; month can't be the last month of the year since
 903                     ;; it has 30 days
 904                     (aref h-month-names h-month))
 905                  (if (= h-yesterday 30)
 906                      (format "%s (second day)" this-month)
 907                    this-month))))
 908       (if (= (% d 7) 6)        ; Saturday--check for Shabbat Mevarchim
 909           (cons mark
 910                 (cond ((and (> h-day 22) (/= h-month 6) (= 29 last-day))
 911                        (format "Mevarchim Rosh Hodesh %s (%s)"
 912                                (aref h-month-names
 913                                      (if (= h-month
 914                                             (calendar-hebrew-last-month-of-year
 915                                              h-year))
 916                                          0 h-month))
 917                                (aref calendar-day-name-array (- 29 h-day))))
 918                       ((and (< h-day 30) (> h-day 22) (= 30 last-day))
 919                        (format "Mevarchim Rosh Hodesh %s (%s-%s)"
 920                                (aref h-month-names h-month)
 921                                (if (= h-day 29)
 922                                    "tomorrow"
 923                                  (aref calendar-day-name-array (- 29 h-day)))
 924                                (aref calendar-day-name-array
 925                                      (% (- 30 h-day) 7))))))
 926         (if (and (= h-day 29) (/= h-month 6))
 927             (cons mark
 928                   (format "Erev Rosh Hodesh %s"
 929                           (aref h-month-names
 930                                 (if (= h-month
 931                                        (calendar-hebrew-last-month-of-year
 932                                         h-year))
 933                                     0 h-month)))))))))
 934 ;;;###diary-autoload
 935 (define-obsolete-function-alias 'diary-rosh-hodesh
 936   'diary-hebrew-rosh-hodesh "23.1")
 937
 938 (defconst calendar-hebrew-parashiot-names
 939   ["Bereshith"   "Noah"      "Lech L'cha" "Vayera"    "Hayei Sarah" "Toledoth"
 940    "Vayetze"     "Vayishlah" "Vayeshev"   "Mikketz"   "Vayiggash"   "Vayhi"
 941    "Shemoth"     "Vaera"     "Bo"         "Beshallah" "Yithro"      "Mishpatim"
 942    "Terumah"     "Tetzavveh" "Ki Tissa"   "Vayakhel"  "Pekudei"     "Vayikra"
 943    "Tzav"        "Shemini"   "Tazria"     "Metzora"   "Aharei Moth" "Kedoshim"
 944    "Emor"        "Behar"     "Behukkotai" "Bemidbar"  "Naso"      "Behaalot'cha"
 945    "Shelah L'cha" "Korah"    "Hukkath"    "Balak"     "Pinhas"      "Mattoth"
 946    "Masei"       "Devarim"   "Vaethanan"  "Ekev"      "Reeh"        "Shofetim"
 947    "Ki Tetze"    "Ki Tavo"   "Nitzavim"   "Vayelech"  "Haazinu"]
 948   "The names of the parashiot in the Torah.")
 949
 950 (defun calendar-hebrew-parasha-name (p)
 951   "Name(s) corresponding to parasha P."
 952   (if (arrayp p)                        ; combined parasha
 953       (format "%s/%s"
 954               (aref calendar-hebrew-parashiot-names (aref p 0))
 955               (aref calendar-hebrew-parashiot-names (aref p 1)))
 956     (aref calendar-hebrew-parashiot-names p)))
 957
 958 ;; Following 14 constants are used in diary-parasha (intern).
 959
 960 ;; The seven ordinary year types (keviot).
 961 (defconst calendar-hebrew-year-Saturday-incomplete-Sunday
 962   [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]
 963        23 24 nil 25 [26 27] [28 29] 30 [31 32] 33 34 35 36 37 38 39 40 [41 42]
 964        43 44 45 46 47 48 49 50]
 965   "The structure of the parashiot.
 966 Hebrew year starts on Saturday, is `incomplete' (Heshvan and Kislev each have
 967 29 days), and has Passover start on Sunday.")
 968
 969 (defconst calendar-hebrew-year-Saturday-complete-Tuesday
 970   [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]
 971        23 24 nil 25 [26 27] [28 29] 30 [31 32] 33 34 35 36 37 38 39 40 [41 42]
 972        43 44 45 46 47 48 49 [50 51]]
 973   "The structure of the parashiot.
 974 Hebrew year that starts on Saturday, is `complete' (Heshvan and Kislev each
 975 have 30 days), and has Passover start on Tuesday.")
 976
 977 (defconst calendar-hebrew-year-Monday-incomplete-Tuesday
 978   [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]
 979       23 24 nil 25 [26 27] [28 29] 30 [31 32] 33 34 35 36 37 38 39 40 [41 42]
 980       43 44 45 46 47 48 49 [50 51]]
 981   "The structure of the parashiot.
 982 Hebrew year that starts on Monday, is `incomplete' (Heshvan and Kislev each
 983 have 29 days), and has Passover start on Tuesday.")
 984
 985 (defconst calendar-hebrew-year-Monday-complete-Thursday
 986   [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]
 987       23 24 nil 25 [26 27] [28 29] 30 [31 32] 33 (nil . 34) (34 . 35) (35 . 36)
 988       (36 . 37) (37 . 38) ([38 39] . 39) 40 [41 42] 43 44 45 46 47 48 49 [50 51]]
 989   "The structure of the parashiot.
 990 Hebrew year that starts on Monday, is `complete' (Heshvan and Kislev each have
 991 30 days), and has Passover start on Thursday.")
 992
 993 (defconst calendar-hebrew-year-Tuesday-regular-Thursday
 994   [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]
 995       23 24 nil 25 [26 27] [28 29] 30 [31 32] 33 (nil . 34) (34 . 35) (35 . 36)
 996       (36 . 37) (37 . 38) ([38 39] . 39) 40 [41 42] 43 44 45 46 47 48 49 [50 51]]
 997   "The structure of the parashiot.
 998 Hebrew year that starts on Tuesday, is `regular' (Heshvan has 29 days and
 999 Kislev has 30 days), and has Passover start on Thursday.")
1000
1001 (defconst calendar-hebrew-year-Thursday-regular-Saturday
1002   [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
1003       24 nil (nil . 25) (25 . [26 27]) ([26 27] . [28 29]) ([28 29] . 30)
1004       (30 . 31) ([31 32] . 32) 33 34 35 36 37 38 39 40 [41 42] 43 44 45 46 47 48
1005       49 50]
1006   "The structure of the parashiot.
1007 Hebrew year that starts on Thursday, is `regular' (Heshvan has 29 days and
1008 Kislev has 30 days), and has Passover start on Saturday.")
1009
1010 (defconst calendar-hebrew-year-Thursday-complete-Sunday
1011   [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
1012       23 24 nil 25 [26 27] [28 29] 30 [31 32] 33 34 35 36 37 38 39 40 [41 42]
1013       43 44 45 46 47 48 49 50]
1014   "The structure of the parashiot.
1015 Hebrew year that starts on Thursday, is `complete' (Heshvan and Kislev each
1016 have 30 days), and has Passover start on Sunday.")
1017
1018 ;; The seven leap year types (keviot).
1019 (defconst calendar-hebrew-year-Saturday-incomplete-Tuesday
1020   [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
1021        23 24 25 26 27 nil 28 29 30 31 32 33 34 35 36 37 38 39 40 [41 42]
1022        43 44 45 46 47 48 49 [50 51]]
1023   "The structure of the parashiot.
1024 Hebrew year that starts on Saturday, is `incomplete' (Heshvan and Kislev each
1025 have 29 days), and has Passover start on Tuesday.")
1026
1027 (defconst calendar-hebrew-year-Saturday-complete-Thursday
1028   [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
1029        23 24 25 26 27 nil 28 29 30 31 32 33 (nil . 34) (34 . 35) (35 . 36)
1030        (36 . 37) (37 . 38) ([38 39] . 39) 40 [41 42] 43 44 45 46 47 48 49 [50 51]]
1031   "The structure of the parashiot.
1032 Hebrew year that starts on Saturday, is `complete' (Heshvan and Kislev each
1033 have 30 days), and has Passover start on Thursday.")
1034
1035 (defconst calendar-hebrew-year-Monday-incomplete-Thursday
1036   [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
1037       23 24 25 26 27 nil 28 29 30 31 32 33 (nil . 34) (34 . 35) (35 . 36)
1038       (36 . 37) (37 . 38) ([38 39] . 39) 40 [41 42] 43 44 45 46 47 48 49 [50 51]]
1039   "The structure of the parashiot.
1040 Hebrew year that starts on Monday, is `incomplete' (Heshvan and Kislev each
1041 have 29 days), and has Passover start on Thursday.")
1042
1043 (defconst calendar-hebrew-year-Monday-complete-Saturday
1044   [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
1045       23 24 25 26 27 nil (nil . 28) (28 . 29) (29 . 30) (30 . 31) (31 . 32)
1046       (32 . 33) (33 . 34) (34 . 35) (35 . 36) (36 . 37) (37 . 38) (38 . 39)
1047       (39 . 40) (40 . 41) ([41 42] . 42) 43 44 45 46 47 48 49 50]
1048   "The structure of the parashiot.
1049 Hebrew year that starts on Monday, is `complete' (Heshvan and Kislev each have
1050 30 days), and has Passover start on Saturday.")
1051
1052 (defconst calendar-hebrew-year-Tuesday-regular-Saturday
1053   [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
1054       23 24 25 26 27 nil (nil . 28) (28 . 29) (29 . 30) (30 . 31) (31 . 32)
1055       (32 . 33) (33 . 34) (34 . 35) (35 . 36) (36 . 37) (37 . 38) (38 . 39)
1056       (39 . 40) (40 . 41) ([41 42] . 42) 43 44 45 46 47 48 49 50]
1057   "The structure of the parashiot.
1058 Hebrew year that starts on Tuesday, is `regular' (Heshvan has 29 days and
1059 Kislev has 30 days), and has Passover start on Saturday.")
1060
1061 (defconst calendar-hebrew-year-Thursday-incomplete-Sunday
1062   [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
1063       23 24 25 26 27 28 nil 29 30 31 32 33 34 35 36 37 38 39 40 41 42
1064       43 44 45 46 47 48 49 50]
1065   "The structure of the parashiot.
1066 Hebrew year that starts on Thursday, is `incomplete' (Heshvan and Kislev both
1067 have 29 days), and has Passover start on Sunday.")
1068
1069 (defconst calendar-hebrew-year-Thursday-complete-Tuesday
1070   [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
1071       23 24 25 26 27 28 nil 29 30 31 32 33 34 35 36 37 38 39 40 41 42
1072       43 44 45 46 47 48 49 [50 51]]
1073   "The structure of the parashiot.
1074 Hebrew year that starts on Thursday, is `complete' (Heshvan and Kislev both
1075 have 30 days), and has Passover start on Tuesday.")
1076
1077 ;;;###diary-autoload
1078 (defun diary-hebrew-parasha (&optional mark)
1079   "Parasha diary entry--entry applies if date is a Saturday.
1080 An optional parameter MARK specifies a face or single-character string to
1081 use when highlighting the day in the calendar."
1082   (let ((d (calendar-absolute-from-gregorian date)))
1083     (if (= (% d 7) 6)                   ; Saturday
1084         (let* ((h-year (calendar-extract-year
1085                         (calendar-hebrew-from-absolute d)))
1086                (rosh-hashanah
1087                 (calendar-hebrew-to-absolute (list 7 1 h-year)))
1088                (passover
1089                 (calendar-hebrew-to-absolute (list 1 15 h-year)))
1090                (rosh-hashanah-day
1091                 (aref calendar-day-name-array (% rosh-hashanah 7)))
1092                (passover-day
1093                 (aref calendar-day-name-array (% passover 7)))
1094                (long-h (calendar-hebrew-long-heshvan-p h-year))
1095                (short-k (calendar-hebrew-short-kislev-p h-year))
1096                (type (cond ((and long-h (not short-k)) "complete")
1097                            ((and (not long-h) short-k) "incomplete")
1098                            (t "regular")))
1099                (year-format
1100                 (symbol-value
1101                  (intern (format "calendar-hebrew-year-%s-%s-%s" ; keviah
1102                                  rosh-hashanah-day type passover-day))))
1103                (first-saturday            ; of Hebrew year
1104                 (calendar-dayname-on-or-before 6 (+ 6 rosh-hashanah)))
1105                (saturday             ; which Saturday of the Hebrew year
1106                 (/ (- d first-saturday) 7))
1107                (parasha (aref year-format saturday)))
1108           (if parasha
1109               (cons mark
1110                     (format
1111                      "Parashat %s"
1112                      (if (listp parasha) ; Israel differs from diaspora
1113                          (if (car parasha)
1114                              (format "%s (diaspora), %s (Israel)"
1115                                      (calendar-hebrew-parasha-name
1116                                       (car parasha))
1117                                      (calendar-hebrew-parasha-name
1118                                       (cdr parasha)))
1119                            (format "%s (Israel)"
1120                                    (calendar-hebrew-parasha-name
1121                                     (cdr parasha))))
1122                        (calendar-hebrew-parasha-name parasha)))))))))
1123
1124 (define-obsolete-function-alias 'diary-parasha 'diary-hebrew-parasha "23.1")
1125
1126
1127 (declare-function solar-setup "solar" ())
1128 (declare-function solar-sunrise-sunset "solar" (date))
1129 (defvar calendar-latitude)
1130 (defvar calendar-longitude)
1131 (defvar calendar-time-zone)
1132
1133
1134 ;; To be called from diary-list-sexp-entries, where DATE is bound.
1135 ;;;###diary-autoload
1136 (defun diary-hebrew-sabbath-candles (&optional mark)
1137   "Local time of candle lighting diary entry--applies if date is a Friday.
1138 No diary entry if there is no sunset on that date.  Uses
1139 `diary-hebrew-sabbath-candles-minutes'.
1140
1141 An optional parameter MARK specifies a face or single-character string to
1142 use when highlighting the day in the calendar."
1143   (require 'solar)
1144   (or (and calendar-latitude calendar-longitude calendar-time-zone)
1145       (solar-setup))
1146   (if (= (% (calendar-absolute-from-gregorian date) 7) 5) ; Friday
1147       (let ((sunset (cadr (solar-sunrise-sunset date))))
1148         (if sunset
1149             (cons mark (format
1150                         "%s Sabbath candle lighting"
1151                         (apply 'solar-time-string
1152                                (cons (- (car sunset)
1153                                         (/ diary-hebrew-sabbath-candles-minutes
1154                                            60.0))
1155                                      (cdr sunset)))))))))
1156
1157 ;;;###diary-autoload
1158 (define-obsolete-function-alias 'diary-sabbath-candles
1159   'diary-hebrew-sabbath-candles "23.1")
1160
1161
1162 (provide 'cal-hebrew)
1163
1164 ;; arch-tag: aaab6718-7712-42ac-a32d-28fe1f944f3c
1165 ;;; cal-hebrew.el ends here