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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.

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


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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