Find Easter and movable feast dates for any year

The job

Easter is the first Sunday after the first full moon on or after the spring equinox — a rule simple to state and fiddly to compute. It drags a chain of movable feasts with it: 46 days back to Ash Wednesday, 40 days forward to Ascension, 50 to Pentecost. Western churches use the Gregorian computus; most Orthodox churches use the Julian one.

Reading the table

Enter a year and read both tables. Western dates are Gregorian civil dates from the Meeus/Jones/Butcher algorithm — the standard implementation, exact for 1583 onward. Orthodox dates are the Julian Easter converted to civil Gregorian dates.

• Each row is a feast offset from Easter Sunday: -46 Ash Wednesday, -7 Palm Sunday, 0 Easter, +39 Ascension, +49 Pentecost, +60 Corpus Christi.
• Orthodox and Western Easters coincide some years and sit weeks apart in others — both appear side by side.

Where it stops

Orthodox dates use the Julian computus as most Orthodox churches observe it; churches on the Revised Julian calendar can differ. The range is 1583–9999 for Western dates. This computes church-calendar dates — public holidays around them (Good Friday, Easter Monday) are set by each country.