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.

[
  :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,
  :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.



43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
 
# File 'lib/support/holidays.rb', line 43

def from_holiday(holiday, year=nil)
  year ||= HebrewDate.new.hebrew_year
  case holiday
    when :EREV_PESACH
      HebrewDate.new_from_hebrew(year, 1, 14)
    when :PESACH
      HebrewDate.new_from_hebrew(year, 1, 15)
    when :PESACH_2
      HebrewDate.new_from_hebrew(year, 1, 21)
    when :PESACH_SHENI
      HebrewDate.new_from_hebrew(year, 2, 15)
    when :YOM_HAZIKARON
      HebrewDate.from_holiday(:YOM_HAATZMAUT).back
    when :YOM_HAATZMAUT
      date = HebrewDate.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
      HebrewDate.new_from_hebrew(year, 2, 18)
    when :YOM_YERUSHALAYIM
      HebrewDate.new_from_hebrew(year, 2, 28)
    when :TZOM_TAMMUZ
      date = HebrewDate.new_from_hebrew(year, 4, 17)
      date.forward if date.day == 7
      date
    when :EREV_SHAVUOT
      HebrewDate.new_from_hebrew(year, 3, 5)
    when :SHAVUOT
      HebrewDate.new_from_hebrew(year, 3, 6)
    when :TISHA_BAV
      date = HebrewDate.new_from_hebrew(year, 5, 9)
      date.forward if date.day == 7
      date
    when :TU_BAV
      HebrewDate.new_from_hebrew(year, 15, 9)
    when :EREV_ROSH_HASHANA
      HebrewDate.new_from_hebrew(year, 6, 29)
    when :ROSH_HASHANA
      HebrewDate.new_from_hebrew(year, 7, 1)
    when :TZOM_GEDALIA
      date = HebrewDate.new_from_hebrew(year, 7, 3)
      date.forward if date.day == 7
      date
    when :EREV_YOM_KIPPUR
      HebrewDate.new_from_hebrew(year, 7, 9)
    when :YOM_KIPPUR
      HebrewDate.new_from_hebrew(year, 7, 10)
    when :EREV_SUKKOT
      HebrewDate.new_from_hebrew(year, 7, 14)
    when :SUKKOT
      HebrewDate.new_from_hebrew(year, 7, 15)
    when :SHMINI_ATZERET
      HebrewDate.new_from_hebrew(year, 7, 22)
    when :EREV_CHANUKAH
      HebrewDate.new_from_hebrew(year, 9, 24)
    when :CHANUKAH
      HebrewDate.new_from_hebrew(year, 9, 25)
    when :TZOM_TEVET
      HebrewDate.new_from_hebrew(year, 10, 10)
    when :TU_BISHVAT
      HebrewDate.new_from_hebrew(year, 11, 15)
    when :PURIM_KATAN
      if HebrewDate.hebrew_leap_year?(year)
        HebrewDate.new_from_hebrew(year, 12, 14)
      end
    when :TAANIT_ESTHER
      date = HebrewDate.new_from_hebrew(year,
                          HebrewDate.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
      HebrewDate.new_from_hebrew(year,
                         HebrewDate.last_month_of_hebrew_year(year), 14)
    when :SHUSHAN_PURIM
      HebrewDate.new_from_hebrew(year,
                         HebrewDate.last_month_of_hebrew_year(year), 15)
  end
end