Easter Date Calculator

Work out easter date instantly with clear inputs, formula shown and shareable results.

About Easter Date Calculator

This uses the anonymous Gregorian computus, an exact integer algorithm that returns Western Easter for any year from 1583 to 4099 without needing lunar tables. Easter is the first Sunday after the ecclesiastical full moon on or after 21 March, which is why it moves across a 35 day window from 22 March to 25 April.

Formula

Computus

a = year mod 19; h = (19a + b - d - g + 15) mod 30; month and day follow from h, l and m

Worked example

With the default values below, Easter Date Calculator returns Easter Sunday of 2026-04-05. Change any input above and every figure here is recalculated in your browser.

Inputs used

Yearaccepts 1,583–4,099: 2,026
Count from: 2026-01-01

Results

Easter Sunday: 2026-04-05
Month: April
Day of the year: 95
Days from your reference date: 94

Step by step

1Values used
2Computus
3Easter Sunday= 2026-04-05
4Month= April
5Day of the year= 95
6Days from your reference date= 94

Assumptions and limits

The result is derived only from the 2 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
Figures are rounded for display to whole numbers, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

How is the Easter Date figure worked out?

a = year mod 19; h = (19a + b - d - g + 15) mod 30; month and day follow from h, l and m. This uses the anonymous Gregorian computus, an exact integer algorithm that returns Western Easter for any year from 1583 to 4099 without needing lunar tables.

Why does this matter?

Easter is the first Sunday after the ecclesiastical full moon on or after 21 March, which is why it moves across a 35 day window from 22 March to 25 April.

What do I need to enter?

Enter year, count from. The defaults shown are a realistic worked example — swap in your own figures to get a result you can use.