class/corlib/System.Globalization/JapaneseCalendar.cs

   1 // System.Globalization.JapaneseCalendar.cs
   2 //
   3 // (C) Ulrich Kunitz 2002
   4 //
   5
   6 //
   7 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining
  10 // a copy of this software and associated documentation files (the
  11 // "Software"), to deal in the Software without restriction, including
  12 // without limitation the rights to use, copy, modify, merge, publish,
  13 // distribute, sublicense, and/or sell copies of the Software, and to
  14 // permit persons to whom the Software is furnished to do so, subject to
  15 // the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be
  18 // included in all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27 //
  28
  29 namespace System.Globalization {
  30
  31 using System;
  32 using System.Runtime.InteropServices;
  33
  34 /// <summary>
  35 /// This is the Japanese calendar. It differs from the Gregorian calendar
  36 /// only in the years.
  37 /// </summary>
  38 /// <remarks>
  39 /// <para>The Japanese calendar support four eras.</para>
  40 /// <list type="table">
  41 /// <listheader>
  42 /// <term>era number</term>
  43 /// <term>Gregorian start date</term>
  44 /// <term>Gregorian end date</term>
  45 /// </listheader>
  46 /// <item>
  47 /// <term>1</term>
  48 /// <term>September 8, 1868</term>
  49 /// <term>July 29, 1912</term>
  50 /// </item>
  51 /// <item>
  52 /// <term>2</term>
  53 /// <term>July 30, 1912</term>
  54 /// <term>December 24, 1926</term>
  55 /// </item>
  56 /// <item>
  57 /// <term>3</term>
  58 /// <term>December 25, 1926</term>
  59 /// <term>January 7, 1989</term>
  60 /// </item>
  61 /// <item>
  62 /// <term>4</term>
  63 /// <term>January 8, 1989</term>
  64 /// <term>present</term>
  65 /// </item>
  66 /// </list>
  67 /// <para>The implementation uses the
  68 /// <see cref="N:CalendricalCalculations"/> namespace.
  69 /// </para>
  70 /// </remarks>
  71 [Serializable]
  72 [ComVisible (true)]
  73 [MonoLimitation ("Serialization format not compatible with .NET")]
  74 public class JapaneseCalendar : Calendar {
  75         /// <summary>
  76         /// Static protected field storing the
  77         /// <see cref="T:CalendricalCalculations.GregorianEraHandler"/>.
  78         /// </summary>
  79         internal static readonly CCGregorianEraHandler M_EraHandler;
  80
  81         /// <summary>
  82         /// Static constructor, who creates and initializes
  83         /// <see cref="F:M_EraHandler"/>.
  84         /// </summary>
  85         static JapaneseCalendar() {
  86                 M_EraHandler = new CCGregorianEraHandler();
  87                 M_EraHandler.appendEra(1,
  88                         CCGregorianCalendar.fixed_from_dmy(8, 9, 1868),
  89                         CCGregorianCalendar.fixed_from_dmy(29, 7, 1912));
  90                 M_EraHandler.appendEra(2,
  91                         CCGregorianCalendar.fixed_from_dmy(30, 7, 1912),
  92                         CCGregorianCalendar.fixed_from_dmy(24, 12, 1926));
  93                 M_EraHandler.appendEra(3,
  94                         CCGregorianCalendar.fixed_from_dmy(25, 12, 1926),
  95                         CCGregorianCalendar.fixed_from_dmy(7, 1, 1989));
  96                 M_EraHandler.appendEra(4,
  97                         CCGregorianCalendar.fixed_from_dmy(8, 1, 1989));
  98         }
  99
 100         /// <summary>
 101         /// Default constructor.
 102         /// </summary>
 103         public JapaneseCalendar() {
 104                 M_AbbrEraNames = new string[] { "M", "T", "S", "H" };
 105                 M_EraNames = new string[] { "Meiji", "Taisho", "Showa",
 106                         "Heisei" };
 107         }
 108
 109
 110         /// <value>Overridden. Gives the eras supported by the
 111         /// calendar as an array of integers.
 112         /// </value>
 113         public override int[] Eras {
 114                 get {
 115                         return (int[])M_EraHandler.Eras.Clone();
 116                 }
 117         }
 118
 119         public override int TwoDigitYearMax
 120         {
 121                 get {
 122                         return twoDigitYearMax;
 123                 }
 124                 set {
 125                         CheckReadOnly ();
 126                         M_ArgumentInRange ("value", value, 100, M_MaxYear);
 127
 128                         twoDigitYearMax = value;
 129                 }
 130         }
 131
 132         /// <summary>
 133         /// A protected member checking a
 134         /// <see cref="T:System.DateTime"/> value.
 135         /// </summary>
 136         /// <param name="time">The
 137         /// <see cref="T:System.DateTime"/>
 138         /// to check.
 139         /// </param>
 140         /// <exception cref="T:System.ArgumentOutOfRangeException">
 141         /// The exception is thrown if the
 142         /// <see cref="T:System.DateTime"/> parameter is outside all
 143         /// supported eras.
 144         /// </exception>
 145         internal void M_CheckDateTime(DateTime time) {
 146                 M_EraHandler.CheckDateTime(time);
 147         }
 148
 149         /// <summary>
 150         /// A protected method checking the era number.
 151         /// </summary>
 152         /// <param name="era">The era number as reference. It is set
 153         /// to <see cref="F:CurrentEra"/>, if the input value is 0.</param>
 154         /// <exception name="T:System.ArgumentException">
 155         /// The exception is thrown if the era is not supported by the class.
 156         /// </exception>
 157         internal void M_CheckEra(ref int era) {
 158                 if (era == CurrentEra)
 159                         era = 4;
 160                 if (!M_EraHandler.ValidEra(era))
 161                         throw new ArgumentException("Era value was not valid.");
 162         }
 163
 164         /// <summary>
 165         /// A protected method checking calendar year and the era number.
 166         /// </summary>
 167         /// <param name="year">An integer representing the calendar year.
 168         /// </param>
 169         /// <param name="era">The era number as reference.</param>
 170         /// <exception name="T:System.ArgumentException">
 171         /// The exception is thrown if the era is not supported by the class.
 172         /// </exception>
 173         /// <exception cref="T:System.ArgumentOutOfRangeException">
 174         /// The exception is thrown if the calendar year is outside of
 175         /// the supported range.
 176         /// </exception>
 177         internal int M_CheckYEG(int year, ref int era) {
 178                 M_CheckEra(ref era);
 179                 return M_EraHandler.GregorianYear(year, era);
 180         }
 181
 182         /// <summary>
 183         /// Checks whether the year is the era is valid, if era = CurrentEra
 184         /// the right value is set.
 185         /// </summary>
 186         /// <param name="year">The year to check.</param>
 187         /// <param name="era">The era to check.</Param>
 188         /// <exception cref="T:ArgumentOutOfRangeException">
 189         /// The exception will be thrown, if the year is not valid.
 190         /// </exception>
 191         internal override void M_CheckYE(int year, ref int era) {
 192                 M_CheckYEG(year, ref era);
 193         }
 194
 195         /// <summary>
 196         /// A protected method checking the calendar year, month, and
 197         /// era number.
 198         /// </summary>
 199         /// <param name="year">An integer representing the calendar year.
 200         /// </param>
 201         /// <param name="month">An integer giving the calendar month.
 202         /// </param>
 203         /// <param name="era">The era number as reference.</param>
 204         /// <exception name="T:System.ArgumentException">
 205         /// The exception is thrown if the era is not supported by the class.
 206         /// </exception>
 207         /// <exception cref="T:System.ArgumentOutOfRangeException">
 208         /// The exception is thrown if the calendar year or month is
 209         /// outside of the supported range.
 210         /// </exception>
 211         internal int M_CheckYMEG(int year, int month, ref int era) {
 212                 int gregorianYear = M_CheckYEG(year, ref era);
 213                 if (month < 1 || month > 12)
 214                         throw new ArgumentOutOfRangeException("month",
 215                                 "Month must be between one and twelve.");
 216                 return gregorianYear;
 217         }
 218
 219         /// <summary>
 220         /// A protected method checking the calendar day, month, and year
 221         /// and the era number.
 222         /// </summary>
 223         /// <param name="year">An integer representing the calendar year.
 224         /// </param>
 225         /// <param name="month">An integer giving the calendar month.
 226         /// </param>
 227         /// <param name="day">An integer giving the calendar day.
 228         /// </param>
 229         /// <param name="era">The era number as reference.</param>
 230         /// <exception name="T:System.ArgumentException">
 231         /// The exception is thrown if the era is not supported by the class.
 232         /// </exception>
 233         /// <exception cref="T:System.ArgumentOutOfRangeException">
 234         /// The exception is thrown if the calendar year, month, or day is
 235         /// outside of the supported range.
 236         /// </exception>
 237         internal int M_CheckYMDEG(int year, int month, int day, ref int era)
 238         {
 239                 int gregorianYear = M_CheckYMEG(year, month, ref era);
 240                 M_ArgumentInRange("day", day, 1, GetDaysInMonth(year, month, era));
 241                 return gregorianYear;
 242         }
 243
 244         /// <summary>
 245         /// Overrideden. Adds months to a given date.
 246         /// </summary>
 247         /// <param name="time">The
 248         /// <see cref="T:System.DateTime"/> to which to add
 249         /// months.
 250         /// </param>
 251         /// <param name="months">The number of months to add.</param>
 252         /// <returns>A new <see cref="T:System.DateTime"/> value, that
 253         /// results from adding <paramref name="months"/> to the specified
 254         /// DateTime.</returns>
 255         /// <exception cref="T:System.ArgumentOutOfRangeException">
 256         /// The exception is thrown if
 257         /// <see cref="T:System.DateTime"/> return value is outside all
 258         /// supported eras.
 259         /// </exception>
 260         public override DateTime AddMonths(DateTime time, int months) {
 261                 DateTime t = CCGregorianCalendar.AddMonths(time, months);
 262                 M_CheckDateTime(t);
 263                 return t;
 264         }
 265
 266         /// <summary>
 267         /// Overridden. Adds years to a given date.
 268         /// </summary>
 269         /// <param name="time">The
 270         /// <see cref="T:System.DateTime"/> to which to add
 271         /// years.
 272         /// </param>
 273         /// <param name="years">The number of years to add.</param>
 274         /// <returns>A new <see cref="T:System.DateTime"/> value, that
 275         /// results from adding <paramref name="years"/> to the specified
 276         /// DateTime.</returns>
 277         /// <exception cref="T:System.ArgumentOutOfRangeException">
 278         /// The exception is thrown if
 279         /// <see cref="T:System.DateTime"/> return value is outside all
 280         /// supported eras.
 281         /// </exception>
 282         public override DateTime AddYears(DateTime time, int years) {
 283                 DateTime t = CCGregorianCalendar.AddYears(time, years);
 284                 M_CheckDateTime(t);
 285                 return t;
 286         }
 287
 288         /// <summary>
 289         /// Overriden. Gets the day of the month from
 290         /// <paramref name="time"/>.
 291         /// </summary>
 292         /// <param name="time">The
 293         /// <see cref="T:System.DateTime"/> that specifies a
 294         /// date.
 295         /// </param>
 296         /// <returns>An integer giving the day of months, starting with 1.
 297         /// </returns>
 298         /// <exception cref="T:System.ArgumentOutOfRangeException">
 299         /// The exception is thrown if the
 300         /// <see cref="T:System.DateTime"/> parameter is outside all
 301         /// supported eras.
 302         /// </exception>
 303         public override int GetDayOfMonth(DateTime time) {
 304                 M_CheckDateTime(time);
 305                 return CCGregorianCalendar.GetDayOfMonth(time);
 306         }
 307
 308         /// <summary>
 309         /// Overriden. Gets the day of the week from the specified date.
 310         /// </summary>
 311         /// <param name="time">The
 312         /// <see cref="T:System.DateTime"/> that specifies a
 313         /// date.
 314         /// </param>
 315         /// <returns>An integer giving the day of months, starting with 1.
 316         /// </returns>
 317         /// <exception cref="T:System.ArgumentOutOfRangeException">
 318         /// The exception is thrown if the
 319         /// <see cref="T:System.DateTime"/> parameter is outside all
 320         /// supported eras.
 321         /// </exception>
 322         public override DayOfWeek GetDayOfWeek(DateTime time) {
 323                 M_CheckDateTime(time);
 324                 int rd = CCFixed.FromDateTime(time);
 325                 return (DayOfWeek)CCFixed.day_of_week(rd);
 326         }
 327
 328         /// <summary>
 329         /// Overridden. Gives the number of the day in the year.
 330         /// </summary>
 331         /// <param name="time">The
 332         /// <see cref="T:System.DateTime"/> that specifies a
 333         /// date.
 334         /// </param>
 335         /// <returns>An integer representing the day of the year,
 336         /// starting with 1.</returns>
 337         /// <exception cref="T:System.ArgumentOutOfRangeException">
 338         /// The exception is thrown if the
 339         /// <see cref="T:System.DateTime"/> parameter is outside all
 340         /// supported eras.
 341         /// </exception>
 342         public override int GetDayOfYear(DateTime time) {
 343                 M_CheckDateTime(time);
 344                 return CCGregorianCalendar.GetDayOfYear(time);
 345         }
 346
 347         /// <summary>
 348         /// Overridden. Gives the number of days in the specified month
 349         /// of the given year and era.
 350         /// </summary>
 351         /// <param name="year">An integer that gives the year.
 352         /// </param>
 353         /// <param name="month">An integer that gives the month, starting
 354         /// with 1.</param>
 355         /// <param name="era">An integer that gives the era of the specified
 356         /// year.</param>
 357         /// <returns>An integer that gives the number of days of the
 358         /// specified month.</returns>
 359         /// <exception cref="T:System.ArgumentOutOfRangeException">
 360         /// The exception is thrown, if <paramref name="month"/>,
 361         /// <paramref name="year"/> ,or <paramref name="era"/> is outside
 362         /// the allowed range.
 363         /// </exception>
 364         public override int GetDaysInMonth(int year, int month, int era) {
 365                 int gregorianYear = M_CheckYMEG(year, month, ref era);
 366                 return CCGregorianCalendar.GetDaysInMonth(gregorianYear, month);
 367         }
 368
 369         /// <summary>
 370         /// Overridden. Gives the number of days of the specified
 371         /// year of the given era.
 372         /// </summary>
 373         /// <param name="year">An integer that specifies the year.
 374         /// </param>
 375         /// <param name="era">An ineger that specifies the era.
 376         /// </param>
 377         /// <returns>An integer that gives the number of days of the
 378         /// specified year.</returns>
 379         /// <exception cref="T:System.ArgumentOutOfRangeExceiption">
 380         /// The exception is thrown, if
 381         /// <paramref name="year"/> or <paramref name="era"/> are outside the
 382         /// allowed range.
 383         /// </exception>
 384         public override int GetDaysInYear(int year, int era) {
 385                 int gregorianYear = M_CheckYEG(year, ref era);
 386                 return CCGregorianCalendar.GetDaysInYear(gregorianYear);
 387         }
 388
 389
 390         /// <summary>
 391         /// Overridden. Gives the era of the specified date.
 392         /// </summary>
 393         /// <param name="time">The
 394         /// <see cref="T:System.DateTime"/> that specifies a
 395         /// date.
 396         /// </param>
 397         /// <returns>An integer representing the era of the calendar.
 398         /// </returns>
 399         /// <exception cref="T:System.ArgumentOutOfRangeException">
 400         /// The exception is thrown if the
 401         /// <see cref="T:System.DateTime"/> parameter is outside all
 402         /// supported eras.
 403         /// </exception>
 404         public override int GetEra(DateTime time) {
 405                 // M_CheckDateTime not needed, because EraYear does the
 406                 // right thing.
 407                 int rd = CCFixed.FromDateTime(time);
 408                 int era;
 409                 M_EraHandler.EraYear(out era, rd);
 410                 return era;
 411         }
 412
 413         [ComVisible (false)]
 414         public override int GetLeapMonth (int year, int era)
 415         {
 416                 return 0;
 417         }
 418
 419         /// <summary>
 420         /// Overridden. Gives the number of the month of the specified
 421         /// date.
 422         /// </summary>
 423         /// <param name="time">The
 424         /// <see cref="T:System.DateTime"/> that specifies a
 425         /// date.
 426         /// </param>
 427         /// <returns>An integer representing the month,
 428         /// starting with 1.</returns>
 429         /// <exception cref="T:System.ArgumentOutOfRangeException">
 430         /// The exception is thrown if the
 431         /// <see cref="T:System.DateTime"/> parameter is outside all
 432         /// supported eras.
 433         /// </exception>
 434         public override int GetMonth(DateTime time) {
 435                 M_CheckDateTime(time);
 436                 return CCGregorianCalendar.GetMonth(time);
 437         }
 438
 439         /// <summary>
 440         /// Overridden. Gives the number of months in the specified year
 441         /// and era.
 442         /// </summary>
 443         /// <param name="year">An integer that specifies the year.
 444         /// </param>
 445         /// <param name="era">An integer that specifies the era.
 446         /// </param>
 447         /// <returns>An integer that gives the number of the months in the
 448         /// specified year.</returns>
 449         /// <exception cref="T:System.ArgumentOutOfRangeException">
 450         /// The exception is thrown, if the year or the era are not valid.
 451         /// </exception>
 452         public override int GetMonthsInYear(int year, int era) {
 453                 M_CheckYE(year, ref era);
 454                 return 12;
 455         }
 456
 457         [ComVisible (false)]
 458         public override int GetWeekOfYear (DateTime time, CalendarWeekRule rule, DayOfWeek firstDayOfWeek)
 459         {
 460                 return base.GetWeekOfYear (time, rule, firstDayOfWeek);
 461         }
 462
 463         /// <summary>
 464         /// Overridden. Gives the number of the year of the specified
 465         /// date.
 466         /// </summary>
 467         /// <param name="time">The
 468         /// <see cref="T:System.DateTime"/> that specifies a
 469         /// date.
 470         /// </param>
 471         /// <returns>An integer representing the year,
 472         /// starting with 1.</returns>
 473         /// <exception cref="T:System.ArgumentOutOfRangeException">
 474         /// The exception is thrown if the
 475         /// <see cref="T:System.DateTime"/> parameter is outside all
 476         /// supported eras.
 477         /// </exception>
 478         public override int GetYear(DateTime time) {
 479                 // M_CheckDateTime not needed, because EraYeat does the
 480                 // right thing.
 481                 int rd = CCFixed.FromDateTime(time);
 482                 int era;
 483                 return M_EraHandler.EraYear(out era, rd);
 484         }
 485
 486         /// <summary>
 487         /// Overridden. Tells whether the given day
 488         /// is a leap day.
 489         /// </summary>
 490         /// <param name="year">An integer that specifies the year in the
 491         /// given era.
 492         /// </param>
 493         /// <param name="month">An integer that specifies the month.
 494         /// </param>
 495         /// <param name="day">An integer that specifies the day.
 496         /// </param>
 497         /// <param name="era">An integer that specifies the era.
 498         /// </param>
 499         /// <returns>A boolean that tells whether the given day is a leap
 500         /// day.
 501         /// </returns>
 502         /// <exception cref="T:System.ArgumentOutOfRangeException">
 503         /// The exception is thrown, if the year, month, day, or era is not
 504         /// valid.
 505         /// </exception>
 506         public override bool IsLeapDay(int year, int month, int day, int era)
 507         {
 508                 int gregorianYear = M_CheckYMDEG(year, month, day, ref era);
 509                 return CCGregorianCalendar.IsLeapDay(gregorianYear, month, day);
 510         }
 511
 512         /// <summary>
 513         /// Overridden. Tells whether the given month
 514         /// is a leap month.
 515         /// </summary>
 516         /// <param name="year">An integer that specifies the year in the
 517         /// given era.
 518         /// </param>
 519         /// <param name="month">An integer that specifies the month.
 520         /// </param>
 521         /// <param name="era">An integer that specifies the era.
 522         /// </param>
 523         /// <returns>A boolean that tells whether the given month is a leap
 524         /// month.
 525         /// </returns>
 526         /// <exception cref="T:System.ArgumentOutOfRangeException">
 527         /// The exception is thrown, if the year, month, or era is not
 528         /// valid.
 529         /// </exception>
 530         public override bool IsLeapMonth(int year, int month, int era) {
 531                 M_CheckYMEG(year, month, ref era);
 532                 return false;
 533         }
 534
 535         /// <summary>
 536         /// Overridden. Tells whether the given year
 537         /// is a leap year.
 538         /// </summary>
 539         /// <param name="year">An integer that specifies the year in the
 540         /// given era.
 541         /// </param>
 542         /// <param name="era">An integer that specifies the era.
 543         /// </param>
 544         /// <returns>A boolean that tells whether the given year is a leap
 545         /// year.
 546         /// </returns>
 547         /// <exception cref="T:System.ArgumentOutOfRangeException">
 548         /// The exception is thrown, if the year or era is not
 549         /// valid.
 550         /// </exception>
 551         public override bool IsLeapYear(int year, int era) {
 552                 int gregorianYear = M_CheckYEG(year, ref era);
 553                 return CCGregorianCalendar.is_leap_year(gregorianYear);
 554         }
 555
 556         /// <summary>
 557         /// Overridden. Creates the
 558         /// <see cref="T:System.DateTime"/> from the parameters.
 559         /// </summary>
 560         /// <param name="year">An integer that gives the year in the
 561         /// <paramref name="era"/>.
 562         /// </param>
 563         /// <param name="month">An integer that specifies the month.
 564         /// </param>
 565         /// <param name="day">An integer that specifies the day.
 566         /// </param>
 567         /// <param name="hour">An integer that specifies the hour.
 568         /// </param>
 569         /// <param name="minute">An integer that specifies the minute.
 570         /// </param>
 571         /// <param name="second">An integer that gives the second.
 572         /// </param>
 573         /// <param name="milliseconds">An integer that gives the
 574         /// milliseconds.
 575         /// </param>
 576         /// <param name="era">An integer that specifies the era.
 577         /// </param>
 578         /// <returns>A
 579         /// <see cref="T:system.DateTime"/> representig the date and time.
 580         /// </returns>
 581         /// <exception cref="T:System.ArgumentOutOfRangeException">
 582         /// The exception is thrown, if at least one of the parameters
 583         /// is out of range.
 584         /// </exception>
 585         public override DateTime ToDateTime(int year, int month, int day,
 586                 int hour, int minute, int second, int millisecond,
 587                 int era)
 588         {
 589                 int gregorianYear = M_CheckYMDEG(year, month, day, ref era);
 590                 M_CheckHMSM(hour, minute, second, millisecond);
 591                 return CCGregorianCalendar.ToDateTime(
 592                         gregorianYear, month, day,
 593                         hour, minute, second, millisecond);
 594         }
 595
 596
 597         /// <summary>
 598         /// This functions returns simply the year for the Japanese calendar.
 599         /// </summary>
 600         /// <param name="year">An integer that gives the year.
 601         /// </param>
 602         /// <returns>The same argument as the year.
 603         /// </returns>
 604         /// <exception cref="T:System.ArgumentOutOfRangeException">
 605         /// The exception is thrown if the year is negative or the resulting
 606         /// year is invalid.
 607         /// </exception>
 608         public override int ToFourDigitYear(int year) {
 609                 if (year < 0)
 610                         throw new ArgumentOutOfRangeException(
 611                                 "year", "Non-negative number required.");
 612                 int era = CurrentEra;
 613                 M_CheckYE(year, ref era);
 614                 return year;
 615         }
 616
 617 #if !NET_2_1
 618         [ComVisible (false)]
 619         public override CalendarAlgorithmType AlgorithmType {
 620                 get {
 621                         return CalendarAlgorithmType.SolarCalendar;
 622                 }
 623         }
 624 #endif
 625
 626         static DateTime JapanMin = new DateTime (1868, 9, 8, 0, 0, 0);
 627         static DateTime JapanMax = new DateTime (9999, 12, 31, 11, 59, 59);
 628
 629         [ComVisible (false)]
 630         public override DateTime MinSupportedDateTime {
 631                 get {
 632                         return JapanMin;
 633                 }
 634         }
 635
 636         [ComVisible (false)]
 637         public override DateTime MaxSupportedDateTime {
 638                 get {
 639                         return JapanMax;
 640                 }
 641         }
 642
 643 } // class JapaneseCalendar
 644
 645 } // namespace System.Globalization