Module: HebCal::Holidays

Defined in:
lib/hebcal/holidays.rb

Instance Method Summary collapse

Instance Method Details

#Is10Tevet(date) ⇒ Object 



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# File 'lib/hebcal/holidays.rb', line 87

def Is10Tevet date
  hash = H.PesachAndYearLength date
  distance = HolidayConstants::STANDARD_10_TEVET_DISTANCE
  distance = distance - 1 if [353, 383].include?(hash[:length])
  distance = distance + 1 if [355, 385].include?(hash[:length])
  H.InRange(H.Distance(hash[:pesach], date), distance, 1)
end

#Is17Tammuz(date) ⇒ Object 



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# File 'lib/hebcal/holidays.rb', line 115

def Is17Tammuz date
  IsFastWithSundayPostponement date, HolidayConstants::FAST_AB_DISTANCE - 21
end

#Is17Tamuz(date) ⇒ Object 



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# File 'lib/hebcal/holidays.rb', line 119

def Is17Tamuz date
  Is17Tammuz date
end

#Is9Ab(date) ⇒ Object 



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# File 'lib/hebcal/holidays.rb', line 107

def Is9Ab date
  IsFastWithSundayPostponement date, HolidayConstants::FAST_AB_DISTANCE
end

#Is9Av(date) ⇒ Object 



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# File 'lib/hebcal/holidays.rb', line 111

def Is9Av date
  Is9Ab date
end

#IsChanuka(date) ⇒ Object 



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# File 'lib/hebcal/holidays.rb', line 79

def IsChanuka date
  IsHanukah date
end

#IsChanukah(date) ⇒ Object 



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# File 'lib/hebcal/holidays.rb', line 71

def IsChanukah date
  IsHanukah date
end

#IsChanukka(date) ⇒ Object 



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# File 'lib/hebcal/holidays.rb', line 83

def IsChanukka date
  IsHanukah date
end

#IsChanukkah(date) ⇒ Object 



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# File 'lib/hebcal/holidays.rb', line 75

def IsChanukkah date
  IsHanukah date
end

#IsFastOfGedalia(date) ⇒ Object 



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# File 'lib/hebcal/holidays.rb', line 123

def IsFastOfGedalia date
  IsFastWithSundayPostponement date, HolidayConstants::SUKKOT_DISTANCE - 12
end

#IsFastOfGedaliah(date) ⇒ Object 



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# File 'lib/hebcal/holidays.rb', line 127

def IsFastOfGedaliah date
  IsFastOfGedalia date
end

#IsFastWithSundayPostponement(date, distance) ⇒ Object 



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# File 'lib/hebcal/holidays.rb', line 103

def IsFastWithSundayPostponement date, distance
  (6 != date.wday && H.InRange(H.DistanceToPassover(date), distance, 1)) || (0 == date.wday && H.InRange(H.DistanceToPassover(date), distance + 1, 1))
end

#IsHanuka(date) ⇒ Object 



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# File 'lib/hebcal/holidays.rb', line 63

def IsHanuka date
  IsHanukah date
end

#IsHanukah(date) ⇒ Object 



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# File 'lib/hebcal/holidays.rb', line 52

def IsHanukah date
  hash = H.PesachAndYearLength date
  distance = HolidayConstants::STANDARD_HANUKAH_DISTANCE
  distance = distance + 1 if [355, 385].include?(hash[:length])
  H.InRange(H.Distance(hash[:pesach], date), distance, 8)
end

#IsHanukka(date) ⇒ Object 



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# File 'lib/hebcal/holidays.rb', line 67

def IsHanukka date
  IsHanukah date
end

#IsHanukkah(date) ⇒ Object 



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# File 'lib/hebcal/holidays.rb', line 59

def IsHanukkah date
  IsHanukah date
end

#IsMoed(date) ⇒ Object 



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# File 'lib/hebcal/holidays.rb', line 32

def IsMoed date
  distance = H.DistanceToPassover(date)
  H.InRange(distance, 2, 4) || H.InRange(distance, HolidayConstants::SUKKOT_DISTANCE + 2, 5)
end

#IsPesach(date) ⇒ Object 



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# File 'lib/hebcal/holidays.rb', line 8

def IsPesach date
  H.InRange(H.DistanceToPassover(date), 0, 8)
end

#IsPurim(date) ⇒ Object 



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# File 'lib/hebcal/holidays.rb', line 48

def IsPurim date
  H.InRange(H.DistanceToPassover(date), HolidayConstants::PURIM_DISTANCE, 1)
end

#IsRegel(date) ⇒ Object 



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# File 'lib/hebcal/holidays.rb', line 37

def IsRegel date
  distance = H.DistanceToPassover(date)
  H.InRange(distance, 0, 8) || H.InRange(distance, HolidayConstants::SHAVUOT_DISTANCE, 2) || H.InRange(distance, HolidayConstants::SUKKOT_DISTANCE, 9)
end

#IsRoshChodesh(date) ⇒ Object 



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# File 'lib/hebcal/holidays.rb', line 171

def IsRoshChodesh date
  IsRoshHodesh date
end

#IsRoshHaShanah(date) ⇒ Object 



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# File 'lib/hebcal/holidays.rb', line 20

def IsRoshHaShanah date
  IsRoshHashanah date
end

#IsRoshHashanah(date) ⇒ Object 



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# File 'lib/hebcal/holidays.rb', line 16

def IsRoshHashanah date
  H.InRange(H.DistanceToPassover(date), HolidayConstants::SUKKOT_DISTANCE - 14, 2)
end

#IsRoshHodesh(date) ⇒ Object 



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# File 'lib/hebcal/holidays.rb', line 145

def IsRoshHodesh date
  hash = H.PesachAndYearLength date
  distance = H.Distance(hash[:pesach], date)
  length = hash[:length]
  distances =      [   -59 + 15,    -59 + 16,    -59 + 30 + 15] # Adar(2) Nisan
  distances.concat [         15,          16,          30 + 15] # Iyar Sivan
  distances.concat [    59 + 15,     59 + 16,     59 + 30 + 15] # Tamuz Ab
  distances.concat [2 * 59 + 15, 2 * 59 + 16]                   # Elul
  distances.concat [3 * 59 + 15, 3 * 59 + 16, 3 * 59 + 30 + 15] # Heshvan, 1st day Kislev
  if [353, 383].include? length then
    distances.concat [4 * 59 + 15] # Tevet
    distances.concat [4 * 59 + 30 + 14] # Shevat
    distances.concat [5 * 59 + 14, 5 * 59 + 15] if 383 == length # Adar1
  elsif [354, 384].include? length then
    distances.concat [4 * 59 + 15, 4 * 59 + 16] # Tevet
    distances.concat [4 * 59 + 30 + 15] # Shevat
    distances.concat [5 * 59 + 15, 5 * 59 + 16] if 384 == length # Adar1
  elsif [355, 385].include? length then
    distances.concat [3 * 59 + 30 + 16] # 2nd day Kislev
    distances.concat [4 * 59 + 16, 4 * 59 + 17] # Tevet
    distances.concat [4 * 59 + 30 + 16] # Shevat
    distances.concat [5 * 59 + 16, 5 * 59 + 17] if 385 == length # Adar1
  end
  distances.include? distance
end

#IsShavuot(date) ⇒ Object 



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# File 'lib/hebcal/holidays.rb', line 12

def IsShavuot date
  H.InRange(H.DistanceToPassover(date), HolidayConstants::SHAVUOT_DISTANCE, 2)
end

#IsSukkot(date) ⇒ Object 



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# File 'lib/hebcal/holidays.rb', line 28

def IsSukkot date
  H.InRange(H.DistanceToPassover(date), HolidayConstants::SUKKOT_DISTANCE, 9)
end

#IsTaanit(date) ⇒ Object 



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# File 'lib/hebcal/holidays.rb', line 139

def IsTaanit date
  return false if 6 == date.wday
  distance = H.DistanceToPassover(date)
  H.InRange(distance, HolidayConstants::FAST_AB_DISTANCE, 1) || H.InRange(distance, HolidayConstants::FAST_AB_DISTANCE - 21, 1) || H.InRange(distance, HolidayConstants::SUKKOT_DISTANCE - 12, 1) || H.InRange(distance, HolidayConstants::PURIM_DISTANCE - 1, 1) || (0 == date.wday && (H.InRange(distance, HolidayConstants::FAST_AB_DISTANCE + 1, 1) || H.InRange(distance, HolidayConstants::FAST_AB_DISTANCE - 21 + 1, 1) || H.InRange(distance, HolidayConstants::SUKKOT_DISTANCE - 12 + 1, 1))) || (4 == date.wday && H.InRange(distance, HolidayConstants::PURIM_DISTANCE - 3, 1)) || Is10Tevet(date)
end

#IsTaanitEster(date) ⇒ Object 



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# File 'lib/hebcal/holidays.rb', line 95

def IsTaanitEster date
  (6 != date.wday && H.InRange(H.DistanceToPassover(date), HolidayConstants::PURIM_DISTANCE - 1, 1)) || (4 == date.wday && H.InRange(H.DistanceToPassover(date), HolidayConstants::PURIM_DISTANCE - 3, 1))
end

#IsTaanitEsther(date) ⇒ Object 



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# File 'lib/hebcal/holidays.rb', line 99

def IsTaanitEsther date
  IsTaanitEster date
end

#IsTzomGedalia(date) ⇒ Object 



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# File 'lib/hebcal/holidays.rb', line 131

def IsTzomGedalia date
  IsFastOfGedalia date
end

#IsTzomGedaliah(date) ⇒ Object 



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# File 'lib/hebcal/holidays.rb', line 135

def IsTzomGedaliah date
  IsFastOfGedalia date
end

#IsYomKippur(date) ⇒ Object 



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# File 'lib/hebcal/holidays.rb', line 24

def IsYomKippur date
  H.InRange(H.DistanceToPassover(date), HolidayConstants::SUKKOT_DISTANCE - 5, 1)
end

#IsYomTov(date) ⇒ Object 



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# File 'lib/hebcal/holidays.rb', line 42

def IsYomTov date
  # Note that Yom Kippur is not a Yom Tov
  distance = H.DistanceToPassover(date)
  result = H.InRange(distance, 0, 2) || H.InRange(distance, 6, 2) || H.InRange(distance, HolidayConstants::SHAVUOT_DISTANCE, 2) || H.InRange(distance, HolidayConstants::SUKKOT_DISTANCE - 14, 2) || H.InRange(distance, HolidayConstants::SUKKOT_DISTANCE, 2) || H.InRange(distance, HolidayConstants::SUKKOT_DISTANCE + 7, 2)
end