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 FileMaker Pro Custom Functions

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Easter ( theYear )

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  Average rating: 4.1  (31 votes)
  Discuss this Custom Function

Reinder Wolting, ABECON

Calculates the date of Easter sunday of a given year

Sample Input:
Easter ( 2008 )
Sample Output:

 Then copy & paste into FileMaker Advanced's Edit Custom Function window.

Click here to copy To Clip Manager if you have myFMbutler's Clip Manager installed


Calculates the date of Easter sunday of a given year.
By adding 39 days to this date you have the date of Ascension Day
By adding 49 days you also have the date of Whitsun.

Note: these functions are not guaranteed or supported by Please contact the individual developer with any questions or problems.

This is my Custom Function and I want to edit it


This function returns incorrect results for all years before 1583.

comment, VR
August 07, 2011 10:09am

Maybe the description for this function should be: Calculates the date of Easter sunday in the Gregorian calendar.

Reinder Wolting, Huizen
August 07, 2011 2:54pm

Hi, I have a problem with this formula, as the output date is not recognized equal to a the field "DateofMonth". I mean:
DateofMonth (08/04/2012) is not recognized equal to EasterDate (08/04/2012) this one calculated with your formula. This I need to mark on a calendar form the holiday date. How it is possible?

alex, italy
September 29, 2011 7:29am

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