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//usr/lib/python2.4/site-packages/mx/DateTime/Feasts.py
""" Calculate moveable feasts that depend on the date of Easter Sunday. Copyright (c) 1998-2000, Marc-Andre Lemburg; mailto:mal@lemburg.com Copyright (c) 2000-2001, eGenix.com Software GmbH; mailto:info@egenix.com See the documentation for further information on copyrights, or contact the author. All Rights Reserved. """ import DateTime _eastereggs = {} def EasterSunday(year): """EasterSunday(year) Return a DateTime instance pointing to Easter Sunday of the given year. Note: it must be given *with* century. Based on the algorithm presented in the Calendar FAQ by Claus Tondering (http://www.pip.dknet.dk/~pip10160/calendar.html), which in return is based on the algorithm of Oudin (1940) as quoted in "Explanatory Supplement to the Astronomical Almanac", P. Kenneth Seidelmann, editor.""" if _eastereggs.has_key(year): return _eastereggs[year] G = year % 19 C = year/100 H = (C - C/4 - (8*C+13)/25 + 19*G + 15) % 30 I = H - (H/28)*(1 - (H/28)*(29/(H + 1))*((21 - G)/11)) J = (year + year/4 + I + 2 - C + C/4) % 7 L = I - J month = 3 + (L + 40)/44 day = L + 28 - 31*(month/4) _eastereggs[year] = d = DateTime.DateTime(year,month,day) return d Ostersonntag = EasterSunday DimanchePaques = EasterSunday # Some common feasts derived from Easter Sunday def CarnivalMonday(year): return EasterSunday(year) - 48 Rosenmontag = CarnivalMonday def MardiGras(year): return EasterSunday(year) - 47 def AshWednesday(year): return EasterSunday(year) - 46 Aschermittwoch = AshWednesday MercrediCendres = AshWednesday def PalmSunday(year): return EasterSunday(year) - 7 Palmsonntag = PalmSunday DimancheRameaux = PalmSunday def EasterFriday(year): return EasterSunday(year) - 2 GoodFriday = EasterFriday Karfreitag = EasterFriday VendrediSaint = EasterFriday def EasterMonday(year): return EasterSunday(year) + 1 Ostermontag = EasterMonday LundiPaques = EasterMonday def Ascension(year): return EasterSunday(year) + 39 Himmelfahrt = Ascension def Pentecost(year): return EasterSunday(year) + 49 WhitSunday = Pentecost Pfingstsonntag = WhitSunday DimanchePentecote = WhitSunday def WhitMonday(year): return EasterSunday(year) + 50 Pfingstmontag = WhitMonday LundiPentecote = WhitMonday def TrinitySunday(year): return EasterSunday(year) + 56 def CorpusChristi(year): return EasterSunday(year) + 60 Fronleichnam = CorpusChristi FeteDieu = CorpusChristi def _test(): import ISO,ARPA year = DateTime.now().year print 'Easter Sunday for the next few years' for i in range(10): easter = EasterSunday(year+i) print 'ISO:',ISO.str(easter),' ARPA:', ARPA.str(easter) if __name__ == '__main__': _test()