Module: CalendariumRomanum::Temporale::Dates

Extended by:
Dates
Includes:
DateHelper
Included in:
Dates
Defined in:
lib/calendarium-romanum/temporale/dates.rb

Overview

Provides methods computing dates of movable feasts and utilities for common computations of relative dates

Constant Summary

Constants included from DateHelper

CalendariumRomanum::Temporale::DateHelper::WEEKDAYS

Instance Method Summary collapse

Methods included from DateHelper

#friday_after, #friday_before, #monday_after, #monday_before, #octave_of, #saturday_after, #saturday_before, #sunday_after, #sunday_before, #thursday_after, #thursday_before, #tuesday_after, #tuesday_before, #wednesday_after, #wednesday_before, #weekday_after, #weekday_before

Instance Method Details

#ascension(year, sunday: false) ⇒ Date

Parameters:

  • year (Integer) —

    liturgical year

  • sunday (Boolean) (defaults to: false) —

    transfer to Sunday?

Returns:

  • (Date) 


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# File 'lib/calendarium-romanum/temporale/dates.rb', line 107

def ascension(year, sunday: false)
  if sunday
    # GNLYC 7 b)
    return easter_sunday(year) + 6 * WEEK
  end

  pentecost(year) - 10
end

#ash_wednesday(year) ⇒ Date

Parameters:

  • year (Integer) —

    liturgical year

Returns:

  • (Date) 


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# File 'lib/calendarium-romanum/temporale/dates.rb', line 60

def ash_wednesday(year)
  easter_sunday(year) - (6 * WEEK + 4)
end

#baptism_of_lord(year, epiphany_on_sunday: false) ⇒ Date

Parameters:

  • year (Integer) —

    liturgical year

  • epiphany_on_sunday (Boolean) (defaults to: false) —

    was Epiphany transferred to Sunday?

Returns:

  • (Date) 


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# File 'lib/calendarium-romanum/temporale/dates.rb', line 50

def baptism_of_lord(year, epiphany_on_sunday: false)
  e = epiphany(year, sunday: epiphany_on_sunday)
  if e.day > 6
    e + 1
  else
    sunday_after e
  end
end

#christ_king(year) ⇒ Date

Parameters:

  • year (Integer) —

    liturgical year

Returns:

  • (Date) 


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# File 'lib/calendarium-romanum/temporale/dates.rb', line 152

def christ_king(year)
  first_advent_sunday(year + 1) - 7
end

#corpus_christi(year, sunday: false) ⇒ Date

Parameters:

  • year (Integer) —

    liturgical year

  • sunday (Boolean) (defaults to: false) —

    transfer to Sunday?

Returns:

  • (Date) 


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# File 'lib/calendarium-romanum/temporale/dates.rb', line 127

def corpus_christi(year, sunday: false)
  if sunday
    # GNLYC 7 c)
    return holy_trinity(year) + WEEK
  end

  holy_trinity(year) + 4
end

#easter_sunday(year) ⇒ Date

Parameters:

  • year (Integer) —

    liturgical year

Returns:

  • (Date) 


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# File 'lib/calendarium-romanum/temporale/dates.rb', line 65

def easter_sunday(year)
  year += 1

  # algorithm below taken from the 'easter' gem:
  # https://github.com/jrobertson/easter

  golden_number = (year % 19) + 1
  dominical_number = (year + (year / 4) - (year / 100) + (year / 400)) % 7
  solar_correction = (year - 1600) / 100 - (year - 1600) / 400
  lunar_correction = (((year - 1400) / 100) * 8) / 25
  paschal_full_moon = (3 - 11 * golden_number + solar_correction - lunar_correction) % 30
  dominical_number += 7 until dominical_number > 0
  paschal_full_moon += 30 until paschal_full_moon > 0
  paschal_full_moon -= 1 if (paschal_full_moon == 29) || ((paschal_full_moon == 28) && golden_number > 11)
  difference = (4 - paschal_full_moon - dominical_number) % 7
  difference += 7 if difference < 0
  day_easter = paschal_full_moon + difference + 1
  if day_easter < 11
    # Easter occurs in March.
    return Date.new(year, 3, day_easter + 21)
  else
    # Easter occurs in April.
    return Date.new(year, 4, day_easter - 10)
  end
end

#epiphany(year, sunday: false) ⇒ Date

Parameters:

  • year (Integer) —

    liturgical year

  • sunday (Boolean) (defaults to: false) —

    transfer to Sunday?

Returns:

  • (Date) 


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# File 'lib/calendarium-romanum/temporale/dates.rb', line 38

def epiphany(year, sunday: false)
  if sunday
    # GNLYC 7 a)
    return sunday_after(Date.new(year + 1, 1, 1))
  end

  Date.new(year + 1, 1, 6)
end

#first_advent_sunday(year) ⇒ Date

Returns:

  • (Date) 


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# File 'lib/calendarium-romanum/temporale/dates.rb', line 10

def first_advent_sunday(year)
  sunday_before(nativity(year)) - 3 * WEEK
end

#good_friday(year) ⇒ Date

Parameters:

  • year (Integer) —

    liturgical year

Returns:

  • (Date) 


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# File 'lib/calendarium-romanum/temporale/dates.rb', line 97

def good_friday(year)
  easter_sunday(year) - 2
end

#holy_family(year) ⇒ Date

Parameters:

  • year (Integer) —

    liturgical year

Returns:

  • (Date) 


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# File 'lib/calendarium-romanum/temporale/dates.rb', line 21

def holy_family(year)
  xmas = nativity(year)
  if xmas.sunday?
    return Date.new(year, 12, 30)
  else
    sunday_after(xmas)
  end
end

#holy_saturday(year) ⇒ Date

Parameters:

  • year (Integer) —

    liturgical year

Returns:

  • (Date) 


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# File 'lib/calendarium-romanum/temporale/dates.rb', line 102

def holy_saturday(year)
  easter_sunday(year) - 1
end

#holy_trinity(year) ⇒ Date

Parameters:

  • year (Integer) —

    liturgical year

Returns:

  • (Date) 


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# File 'lib/calendarium-romanum/temporale/dates.rb', line 122

def holy_trinity(year)
  octave_of(pentecost(year))
end

#immaculate_heart(year) ⇒ Date

Parameters:

  • year (Integer) —

    liturgical year

Returns:

  • (Date) 


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# File 'lib/calendarium-romanum/temporale/dates.rb', line 147

def immaculate_heart(year)
  pentecost(year) + 20
end

#mother_of_church(year) ⇒ Date

Parameters:

  • year (Integer) —

    liturgical year

Returns:

  • (Date) 


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# File 'lib/calendarium-romanum/temporale/dates.rb', line 142

def mother_of_church(year)
  pentecost(year) + 1
end

#mother_of_god(year) ⇒ Date

Parameters:

  • year (Integer) —

    liturgical year

Returns:

  • (Date) 


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# File 'lib/calendarium-romanum/temporale/dates.rb', line 31

def mother_of_god(year)
  octave_of(nativity(year))
end

#nativity(year) ⇒ Date

Parameters:

  • year (Integer) —

    liturgical year

Returns:

  • (Date) 


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# File 'lib/calendarium-romanum/temporale/dates.rb', line 16

def nativity(year)
  Date.new(year, 12, 25)
end

#palm_sunday(year) ⇒ Date

Parameters:

  • year (Integer) —

    liturgical year

Returns:

  • (Date) 


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# File 'lib/calendarium-romanum/temporale/dates.rb', line 92

def palm_sunday(year)
  easter_sunday(year) - 7
end

#pentecost(year) ⇒ Date

Parameters:

  • year (Integer) —

    liturgical year

Returns:

  • (Date) 


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# File 'lib/calendarium-romanum/temporale/dates.rb', line 117

def pentecost(year)
  easter_sunday(year) + 7 * WEEK
end

#sacred_heart(year) ⇒ Date

Parameters:

  • year (Integer) —

    liturgical year

Returns:

  • (Date) 


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# File 'lib/calendarium-romanum/temporale/dates.rb', line 137

def sacred_heart(year)
  corpus_christi(year) + 8
end