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Calculating the Easter Date

The date of Easter Sunday is the first Sunday after the first Full Moon occurring on or after March 21.

Illustration image

An Easter Sunday date in the calendar.


Easter Sunday celebrates the Christian belief of Jesus Christ's resurrection. The Easter date is set in relation to the March Equinox. However, the church counts March 21 as the equinox date in the ecclesiastical calendar, rather than the actual date, which varies between March 19, 20, and 21.

Setting the Easter Date

The March equinox coincides with Easter Sunday and holidays that are related to it. These holidays do not fall on a fixed date in the Gregorian calendar, or the Julian calendar, which is still used by many Orthodox Christian churches.

The dates of many Christian holidays depend on the Easter date. Some of these holidays include:

According to the Bible, Jesus Christ's death and resurrection occurred around the time of the Jewish Passover, which was celebrated on the first Full Moon following the vernal equinox.

This soon led to Christians celebrating Easter on different dates. At the end of the 2nd century, some churches celebrated Easter on the day of the Passover, while others celebrated it on the following Sunday.

Earliest Easter Dates from 1753 - 2400.

Gregorian CalendarJulian Calendar
March 221761April 31763
March 221818April 41790
March 222285April 41847
March 222353April 41858
March 231788April 41915
March 231845April 42010
March 231856April 51801
March 231913April 51885
March 232008April 51896
March 232160April 51942
March 232228April 51953
March 232380April 52037
  April 52048
  April 52105
* All Dates are Converted to Gregorian Calendar Dates (Julian Dates)

In 325CE the Council of Nicaea established that Easter would be held on the first Sunday after the first Full Moon occurring on or after the vernal equinox.(*) From that point forward, the Easter date depended on the ecclesiastical approximation of March 21 for the vernal equinox.

Easter is delayed by 1 week if the Full Moon is on Sunday, which decreases the chances of it falling on the same day as the Jewish Passover. The council’s ruling is contrary to the Quartodecimans, a group of Christians who celebrated Easter on the day of the Full Moon, 14 days into the month.

Comparative calendars

Not all Christian churches observe Easter according to the Gregorian calendar. Some churches still observe Easter under the Julian calendar.

The Gregorian calendar was created because the Julian calendar was slightly too long. With the Julian calendar, the equinox date moved towards the earlier dates of March and further away from the Easter. Therefore, the introduction of the Gregorian calendar allowed for a realignment with the equinox.

In the Gregorian calendar, Easter falls on a Sunday between March 22 and April 25 from 1753 to 2400. In the Julian calendar, used by some eastern or Orthodox churches, Easter also falls on a Sunday from March 22 to April 25, which in the Gregorian calendar are from April 3 to May 10 from 1753 to 2400.

In 2007 Easter fell on the same date (April 8) in both calendars when the Julian date was converted to the Gregorian date. This also happened in other years, such as 2004, 2010 and 2011.

Latest Easter Dates from 1753 to 2400

Gregorian CalendarJulian Calendar
April 231848May 72051
April 231905May 72271
April 231916May 72344
April 232000May 81983
April 232079May 82078
April 232152May 82135
April 232220May 82146
April 241791May 82203
April 241859May 82287
April 242011May 82298
April 242095May 82355
April 242163May 82366
April 242231May 92173
April 242383May 92230
April 251886May 92241
April 251943May 92382
April 252038May 92393
  May 102268
  May 102325
  May 102336
* All Dates are Converted to Gregorian Calendar Dates (Julian Dates)

Proposed Easter Date Reforms

There have been a number of suggested reforms for the Easter date. For example, in 1997 the World Council of Churches proposed a reform of the Easter calculation to replace an equation-based method of calculating Easter with direct astronomical observation.

This would have solved the Easter date difference between churches that observe the Gregorian calendar and those that observe the Julian calendar. The reform was proposed to be implemented in 2001, but it is not yet adopted.

Another example of a proposed reform occurred in the United Kingdom, where the Easter Act 1928 was established to allow the Easter date to be fixed as the first Sunday after the second Saturday in April. However, this law was not implemented, although it remains on the UK Statute Law Database.

(*) The resolution's exact wording is unknown, so the council's precise contribution to the process of determining the date of Easter is disputed. However, according to some historians, contemporary sources (e.g., by Epiphanius of Salamis and Socrates of Constantinople) suggest that the council decided on an Easter date after the spring equinox.

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