Module: HebrewDateSupport::HolidayMethods::ClassMethods

Included in:
HebrewDate
Defined in:
lib/support/holidays.rb

Constant Summary collapse

HOLIDAYS =

A list of holidays which can be passed into the from_holiday method.

[
  :TAANIT_BECHORIM,
  :EREV_PESACH,
  :PESACH,
  :PESACH_2,
  :PESACH_SHENI,
  :YOM_HAATZMAUT,
  :YOM_HAZIKARON,
  :YOM_YERUSHALAYIM,
  :LAG_BAOMER,
  :EREV_SHAVUOT,
  :SHAVUOT,
  :TZOM_TAMMUZ,
  :TISHA_BAV,
  :TU_BAV,
  :EREV_ROSH_HASHANA,
  :ROSH_HASHANA,
  :TZOM_GEDALIA,
  :EREV_YOM_KIPPUR,
  :YOM_KIPPUR,
  :EREV_SUKKOT,
  :SUKKOT,
  :SHMINI_ATZERET,
  :SIMCHAT_TORAH,
  :EREV_CHANUKAH,
  :CHANUKAH,
  :TZOM_TEVET,
  :TU_BISHVAT,
  :PURIM_KATAN,
  :TAANIT_ESTHER,
  :PURIM,
  :SHUSHAN_PURIM
]

Instance Method Summary collapse

Instance Method Details

#from_holiday(holiday, year = nil) ⇒ Object

Given a holiday name, return a HebrewDate representing that holiday.

Parameters:

  • holiday (Symbol) —

    the name of the holiday. Possible values are in the HOLIDAYS array.

  • year (Integer) (defaults to: nil) —

    if given, the Hebrew year to search. Defaults to the current year.



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# File 'lib/support/holidays.rb', line 45

def from_holiday(holiday, year=nil)
  year ||= self.new.hebrew_year
  case holiday
    when :TAANIT_BECHORIM
      date = self.from_holiday(:EREV_PESACH, year)
      date.shabbos? ? date - 2 : date
    when :EREV_PESACH
      self.new_from_hebrew(year, 1, 14)
    when :PESACH
      self.new_from_hebrew(year, 1, 15)
    when :PESACH_2
      self.new_from_hebrew(year, 1, 21)
    when :PESACH_SHENI
      self.new_from_hebrew(year, 2, 15)
    when :YOM_HAZIKARON
      self.from_holiday(:YOM_HAATZMAUT, year).back
    when :YOM_HAATZMAUT
      date = self.new_from_hebrew(year, 2, 5)
      # Friday or Shabbat - move back to Thursday
      # Monday - move forward to Tuesday
      if date.day == 6
        date.back
      elsif date.day == 2
        date.forward
      elsif date.day == 7
        date.set_hebrew_date(year, 2, 3)
      end
    when :LAG_BAOMER
      self.new_from_hebrew(year, 2, 18)
    when :YOM_YERUSHALAYIM
      self.new_from_hebrew(year, 2, 28)
    when :TZOM_TAMMUZ
      date = self.new_from_hebrew(year, 4, 17)
      date.forward if date.day == 7
      date
    when :EREV_SHAVUOT
      self.new_from_hebrew(year, 3, 5)
    when :SHAVUOT
      self.new_from_hebrew(year, 3, 6)
    when :TISHA_BAV
      date = self.new_from_hebrew(year, 5, 9)
      date.forward if date.day == 7
      date
    when :TU_BAV
      self.new_from_hebrew(year, 15, 9)
    when :EREV_ROSH_HASHANA
      self.new_from_hebrew(year, 6, 29)
    when :ROSH_HASHANA
      self.new_from_hebrew(year, 7, 1)
    when :TZOM_GEDALIA
      date = self.new_from_hebrew(year, 7, 3)
      date.forward if date.day == 7
      date
    when :EREV_YOM_KIPPUR
      self.new_from_hebrew(year, 7, 9)
    when :YOM_KIPPUR
      self.new_from_hebrew(year, 7, 10)
    when :EREV_SUKKOT
      self.new_from_hebrew(year, 7, 14)
    when :SUKKOT
      self.new_from_hebrew(year, 7, 15)
    when :SHMINI_ATZERET
      self.new_from_hebrew(year, 7, 22)
    when :SIMCHAT_TORAH
      self.new_from_hebrew(year, 7, 23)
    when :EREV_CHANUKAH
      self.new_from_hebrew(year, 9, 24)
    when :CHANUKAH
      self.new_from_hebrew(year, 9, 25)
    when :TZOM_TEVET
      self.new_from_hebrew(year, 10, 10)
    when :TU_BISHVAT
      self.new_from_hebrew(year, 11, 15)
    when :PURIM_KATAN
      if self.hebrew_leap_year?(year)
        self.new_from_hebrew(year, 12, 14)
      end
    when :TAANIT_ESTHER
      date = self.new_from_hebrew(year,
                          self.last_month_of_hebrew_year(year), 13)
      if date.day == 7
        date.set_hebrew_date(year, date.hebrew_month, 11)
      elsif date.day == 6
        date.back
      end
      date
    when :PURIM
      self.new_from_hebrew(year,
                         self.last_month_of_hebrew_year(year), 14)
    when :SHUSHAN_PURIM
      self.new_from_hebrew(year,
                         self.last_month_of_hebrew_year(year), 15)
  end
end