Brian Dunning's FileMaker Custom Functions


creates a random date between the specified first and last dates, inclusive

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Jeff Drake   Jeff Drake
Drakeling Technologies

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  Sample input:
RandomDate (

Date ( 1 ; 1 ; 2015 ) ;

Date ( 9 ; 4 ; 2015 )

  Sample output:

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

This function is designed to aid in creating “dummy” data for your FileMaker Pro database. For example, you can specify a calculation in the “Calculated value” dialog under field options and have a random date entered into each new record.



unin   unin, Japan
Sep 10, 2015
dateFirst + Int ( Random * ( dateLast - dateFirst + 1 ) )

Using Int() for Random is the programming pattern.

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

Under construction. Email me your wish list for improvements.