Christian Tools
Easter and the movable liturgical calendar, the Julian calendar, and other Christian calculators.
Sourcing and methodology for this tradition's tools are summarized on How we verify.
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New
Easter Date Calculator
Western/Gregorian Easter Sunday for any year, via the Meeus/Jones/Butcher computus.
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Orthodox Easter Date Calculator
Orthodox Pascha for any year — a genuinely separate Julian-calendar calculation.
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Liturgical Calendar (Movable Feasts)
Ash Wednesday through Trinity Sunday — every movable feast, derived from Easter.
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Julian ↔ Gregorian Date Converter
Convert between the Julian and Gregorian calendars, still 13 days apart today.
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Liturgical Season & Color Lookup
Which liturgical season and traditional color a given date falls in.
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Tithing Calculator
10% tithe on any income amount, with an adjustable percentage.
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Lenten Fasting Day Counter
Which of the 40 Lenten fasting days (Sundays excluded) a given date falls on.