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IsValidYear ( ~year )

Check if a given year is valid.

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Thomas DS - Show more from this author

Sample input:

IsValidYear ( 2020 )

Sample output:

Function definition: (Copy & paste into FileMaker's Edit Custom Function window)

IsValid( Date( 1; 1; ~year ) )

The result is boolean.

Valid year in FileMaker:
year - the year (four digits between 0001 and 4000—for example, 2019 but not 19).
( source: https://help.claris.com/en/pro-help/content/date.html )

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