Calculate Easter for Any Year

>>Script Language and Platform: T-SQL/SQL Server (All versions)
I needed an easy way to add Easter holiday to an events table for a database supporting a web calendar. After a little research, I found an algorithm to calculate the Western traditional date. It works for any year in the Gregorian calendar, any year after 1582.

The function accepts a four digit integer value for the year for which you want the Easter date. Any entry less than 1582 will return an error message, so I suggest using it in conjuction with the IsDate() function.

Example 1:

Select dbo.Year2Easter(2005) as Easter

Example 2:

Declare @Year int,
@Years int

Set @Year = Year(getdate())
Set @Years = 10
Set @Years = @Years + @Year

While @Year <= @Years
Select @Year As [Year],
Easter = Case IsDate
When 1 Then dbo.Year2Easter(@Year)
Else Null

Set @Year = @Year + 1

Author: Robert Davis

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