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 FileMaker Pro Custom Functions

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Unix_Date ( current_timestamp ; time_zone_offset )

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  Average rating: 4.2  (32 votes)
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Tony Moller, DCWerks, LLC

Calculates the Unix Epoch Date

Sample Input:
Unix_Date ( Get ( CurrentTimeStamp ); 0 )
Sample Output:

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


Calculates the Unix timestamp, which is the number of seconds from 1/1/1970. If you use FileMaker's Get (CurrentTimeStamp) function to send the timestamp to the Unix_Date function, make sure you set the time_zone_offset to your local time zone (-5 is EST, -4 is EDT). Setting time_zone_offset to 0 (zero) will treat the timestamp as GMT.

Feel free to email me at with comments or corrections.

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


A simpler method that accomplishes the same purpose (unless I am missing something) is as follows (where _timestamp and _hourOffset are the function parameters):

Let ([
min = GetAsTimestamp ( Date ( 1 ; 1 ; 1970 ) ) ;
max = GetAsTimestamp ( Date( 7 ; 8 ; 2038 ) )

If ( _timestamp ≥ min and _timestamp ≤ max;
GetAsNumber ( _timestamp ) - GetAsNumber ( min ) - ( _hourOffset * 3600 )

Kevin Vile, Ohio
July 20, 2010 6:58am

Can you use this unix epoch date to regenerate an accurate timestamp?

My understanding is: Unix Epoch dates do not account for leap seconds.

p10, Vancouver
January 05, 2012 9:48am

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