Module: CalendariumRomanum::Temporale::Dates
- Defined in:
- lib/calendarium-romanum/temporale/dates.rb
Overview
dates of movable feasts
Constant Summary collapse
- WEEKDAYS =
%w{sunday monday tuesday wednesday thursday friday saturday}
Class Method Summary collapse
- .ascension(year) ⇒ Object
- .ash_wednesday(year) ⇒ Object
- .baptism_of_lord(year) ⇒ Object
- .body_blood(year) ⇒ Object
- .christ_king(year) ⇒ Object
- .easter_sunday(year) ⇒ Object
- .epiphany(year) ⇒ Object
- .first_advent_sunday(year) ⇒ Object
- .good_friday(year) ⇒ Object
- .holy_family(year) ⇒ Object
- .holy_saturday(year) ⇒ Object
- .holy_trinity(year) ⇒ Object
- .immaculate_heart(year) ⇒ Object
- .mother_of_god(year) ⇒ Object
- .nativity(year) ⇒ Object
- .octave_of(date) ⇒ Object
- .palm_sunday(year) ⇒ Object
- .pentecost(year) ⇒ Object
- .sacred_heart(year) ⇒ Object
- .weekday_after(weekday, date) ⇒ Object
-
.weekday_before(weekday, date) ⇒ Object
utility methods.
Class Method Details
.ascension(year) ⇒ Object
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# File 'lib/calendarium-romanum/temporale/dates.rb', line 83 def self.ascension(year) pentecost(year) - 10 end |
.ash_wednesday(year) ⇒ Object
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# File 'lib/calendarium-romanum/temporale/dates.rb', line 34 def self.ash_wednesday(year) easter_sunday(year) - (6 * Temporale::WEEK + 4) end |
.baptism_of_lord(year) ⇒ Object
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# File 'lib/calendarium-romanum/temporale/dates.rb', line 30 def self.baptism_of_lord(year) sunday_after epiphany(year) end |
.body_blood(year) ⇒ Object
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# File 'lib/calendarium-romanum/temporale/dates.rb', line 95 def self.body_blood(year) holy_trinity(year) + 4 end |
.christ_king(year) ⇒ Object
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# File 'lib/calendarium-romanum/temporale/dates.rb', line 107 def self.christ_king(year) first_advent_sunday(year + 1) - 7 end |
.easter_sunday(year) ⇒ Object
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# File 'lib/calendarium-romanum/temporale/dates.rb', line 38 def self.easter_sunday(year) year += 1 # algorithm below taken from the 'easter' gem: # https://github.com/jrobertson/easter golden_number = (year % 19) + 1 if year <= 1752 then # Julian calendar dominical_number = (year + (year / 4) + 5) % 7 paschal_full_moon = (3 - (11 * golden_number) - 7) % 30 else # Gregorian calendar 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 end 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 or (paschal_full_moon == 28 and 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 then # Easter occurs in March. return Date.new(y=year, m=3, d=day_easter + 21) else # Easter occurs in April. return Date.new(y=year, m=4, d=day_easter - 10) end end |
.epiphany(year) ⇒ Object
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# File 'lib/calendarium-romanum/temporale/dates.rb', line 26 def self.epiphany(year) Date.new(year+1, 1, 6) end |
.first_advent_sunday(year) ⇒ Object
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# File 'lib/calendarium-romanum/temporale/dates.rb', line 5 def self.first_advent_sunday(year) sunday_before(nativity(year)) - 3 * Temporale::WEEK end |
.good_friday(year) ⇒ Object
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# File 'lib/calendarium-romanum/temporale/dates.rb', line 75 def self.good_friday(year) easter_sunday(year) - 2 end |
.holy_family(year) ⇒ Object
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# File 'lib/calendarium-romanum/temporale/dates.rb', line 13 def self.holy_family(year) xmas = nativity(year) if xmas.sunday? return Date.new(year, 12, 30) else sunday_after(xmas) end end |
.holy_saturday(year) ⇒ Object
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# File 'lib/calendarium-romanum/temporale/dates.rb', line 79 def self.holy_saturday(year) easter_sunday(year) - 1 end |
.holy_trinity(year) ⇒ Object
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# File 'lib/calendarium-romanum/temporale/dates.rb', line 91 def self.holy_trinity(year) octave_of(pentecost(year)) end |
.immaculate_heart(year) ⇒ Object
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# File 'lib/calendarium-romanum/temporale/dates.rb', line 103 def self.immaculate_heart(year) pentecost(year) + 20 end |
.mother_of_god(year) ⇒ Object
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# File 'lib/calendarium-romanum/temporale/dates.rb', line 22 def self.mother_of_god(year) octave_of(nativity(year)) end |
.nativity(year) ⇒ Object
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# File 'lib/calendarium-romanum/temporale/dates.rb', line 9 def self.nativity(year) Date.new(year, 12, 25) end |
.octave_of(date) ⇒ Object
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# File 'lib/calendarium-romanum/temporale/dates.rb', line 133 def self.octave_of(date) date + Temporale::WEEK end |
.palm_sunday(year) ⇒ Object
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# File 'lib/calendarium-romanum/temporale/dates.rb', line 71 def self.palm_sunday(year) easter_sunday(year) - 7 end |
.pentecost(year) ⇒ Object
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# File 'lib/calendarium-romanum/temporale/dates.rb', line 87 def self.pentecost(year) easter_sunday(year) + 7 * Temporale::WEEK end |
.sacred_heart(year) ⇒ Object
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# File 'lib/calendarium-romanum/temporale/dates.rb', line 99 def self.sacred_heart(year) body_blood(year) + 8 end |
.weekday_after(weekday, date) ⇒ Object
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# File 'lib/calendarium-romanum/temporale/dates.rb', line 123 def self.weekday_after(weekday, date) if date.wday == weekday then return date + Temporale::WEEK elsif weekday > date.wday return date + (weekday - date.wday) else return date + (Temporale::WEEK - date.wday + weekday) end end |
.weekday_before(weekday, date) ⇒ Object
utility methods
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# File 'lib/calendarium-romanum/temporale/dates.rb', line 113 def self.weekday_before(weekday, date) if date.wday == weekday then return date - Temporale::WEEK elsif weekday < date.wday return date - (date.wday - weekday) else return date - (date.wday + Temporale::WEEK - weekday) end end |