01
Calculation basis
Uses the Meeus/Jones/Butcher computus commonly used for Western Gregorian Easter. The input range starts after Gregorian adoption is stable for this formula.
Uses the Meeus/Jones/Butcher Gregorian computus as a date reference.
Observed practice can vary by church tradition and local calendar. Treat this as a date reference.
Uses the Meeus/Jones/Butcher computus commonly used for Western Gregorian Easter. The input range starts after Gregorian adoption is stable for this formula.
Eastern churches, Julian liturgical calendars, and local church notices may use different dates. Confirm official worship or event schedules with the relevant church body.