Calendar calculations

• Day of the week (Gregorian)
• Day of the week (Julian)
• Difference between Julian and Gregorian calendar
• Easter Sunday in the given year (years 1582–2399)
• Is the given year a leap year (Gregorian and Julian calendar)?

Please enter the desired date

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Day	--01020304050607080910111213141516171819202122232425262728293031
Month	--JanuaryFebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecember
Centuries	--0123456789101112131415161718192021222324252627282930	19 for 1980, 4 for 476
Years in the century	--0001020304050607080910111213141516171819202122232425262728293021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899	80 for 1980, 76 for 476

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© CC BY-SA, 2001-2014, Th. Tunsch
Formel von Ch. Zeller (Butkewitsch, A. W.; Selikson, M. S.: Ewige Kalender. - Leipzig: BSB B. G. Teubner Verlagsgesellschaft, 1987 (5., überarb. Aufl.). - S. 87), Osterformel nach: Schlag nach: Natur. - Leipzig: VEB Bibliographisches Institut, 1954. - S. 86
Quellcode