Easter Date Calculator (and Carnival, Good Friday, Corpus Christi)
Date of Easter Sunday in any year from 1583, with the movable holidays that depend on it and the Orthodox Easter date.
Results
What this tool does
Easter falls on the first Sunday after the first ecclesiastical full moon on or after 21 March, so it moves between 22 March and 25 April. The calculation uses the church's tabular moon rather than the astronomical one, which is why it occasionally differs by a week from what a sky-watcher would expect. Carnival comes 47 days before, Good Friday two days before and Corpus Christi 60 days after — all of them public holidays in some countries. Orthodox churches still compute Easter on the Julian calendar, so their date is converted here to the ordinary calendar.
Formula
Gregorian computus (anonymous algorithm, Meeus): Easter = first Sunday after the ecclesiastical full moon on or after 21 March
Variables
| Symbol | Meaning | Unit |
|---|---|---|
yr | Year | — |
EAD | Easter Sunday — day | — |
EAM | Easter Sunday — month | — |
GOD | Good Friday — day | — |
GOM | Good Friday — month | — |
CAD | Carnival / Shrove Tuesday — day | — |
CAM | Carnival / Shrove Tuesday — month | — |
COD | Corpus Christi — day | — |
COM | Corpus Christi — month | — |
ORD | Orthodox Easter — day | — |
ORM | Orthodox Easter — month | — |
Worked example
- Year2026
- Easter Sunday — day5
- Easter Sunday — monthApril
- Good Friday — day3
- Good Friday — monthApril
- Carnival / Shrove Tuesday — day17
- Carnival / Shrove Tuesday — monthFebruary
- Corpus Christi — day4
- Corpus Christi — monthJune
- Orthodox Easter — day12
- Orthodox Easter — monthApril
Limitations
- Dates are handled in the proleptic Gregorian calendar, which is the one computers use. For dates before the Gregorian reform of 1582 this differs from what was written at the time.
- Only Saturdays and Sundays are excluded. Public holidays differ by country and are not deducted.