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48 lines
1.3 KiB
Ruby
48 lines
1.3 KiB
Ruby
#! /usr/bin/env ruby
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# goodfriday.rb: Written by Tadayoshi Funaba 1998, 2000, 2002
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# $Id: goodfriday.rb,v 1.1 1998-03-08 18:44:44+09 tadf Exp $
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require 'date'
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def easter(y)
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g = (y % 19) + 1
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c = (y / 100) + 1
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x = (3 * c / 4) - 12
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z = ((8 * c + 5) / 25) - 5
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d = (5 * y / 4) - x - 10
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e = (11 * g + 20 + z - x) % 30
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e += 1 if e == 25 and g > 11 or e == 24
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n = 44 - e
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n += 30 if n < 21
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n = n + 7 - ((d + n) % 7)
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if n <= 31 then [y, 3, n] else [y, 4, n - 31] end
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end
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es = Date.new(*easter(Time.now.year))
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[[-9*7, 'Septuagesima Sunday'],
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[-8*7, 'Sexagesima Sunday'],
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[-7*7, 'Quinquagesima Sunday (Shrove Sunday)'],
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[-48, 'Shrove Monday'],
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[-47, 'Shrove Tuesday'],
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[-46, 'Ash Wednesday'],
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[-6*7, 'Quadragesima Sunday'],
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[-3*7, 'Mothering Sunday'],
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[-2*7, 'Passion Sunday'],
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[-7, 'Palm Sunday'],
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[-3, 'Maunday Thursday'],
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[-2, 'Good Friday'],
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[-1, 'Easter Eve'],
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[0, 'Easter Day'],
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[1, 'Easter Monday'],
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[7, 'Low Sunday'],
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[5*7, 'Rogation Sunday'],
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[39, 'Ascension Day (Holy Thursday)'],
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[42, 'Sunday after Ascension Day'],
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[7*7, 'Pentecost (Whitsunday)'],
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[50, 'Whitmonday'],
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[8*7, 'Trinity Sunday'],
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[60, 'Corpus Christi (Thursday after Trinity)']].
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each do |xs|
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puts((es + xs.shift).to_s + ' ' + xs.shift)
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end
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