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 FileMaker Pro Custom Functions

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FormatDateLocale ( thedate ; formatstring ; LocaleID )

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  Average rating: 3.5  (43 votes)
  Discuss this Custom Function

Theo Ros, n/a

Formats a date according to a Format string and a given language ID

Sample Input:
FormatDateLocale ( Date ( 7 ; 9 ; 2005 ) ; "DDDD, D MMMM YYYY" , "nl" )
Sample Output:
"zaterdag, 9 juli 2005"

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


Formats a date according to a Format string and a given language ID:

In: thedate - a field or value containing a date
formatstring - a string like "DDDD, MMMM D YYYY"
LocaleID - a string containing the Language ID
currently supported:
"nl" -> Dutch
"en" -> English
"ge" -> German
"fr" -> French
"es" -> Spanish

formatstring can hold the following patterns:
"YYYY" : 4 digit year
"YYY" : same as "YYYY"
"YY" : 2 digit year
"Y" : 1 digit year
"MMMM" : Full month name
"MMM" : Short month name
"MM" : 2 digit month (leading 0)
"M" : 1 or 2 digit month
"DDDD" : Full weekday name
"DDD" : Short weekday name
"DD" : 2 digit daynumber (leading 0)
"D" : 1 or 2 digit daynumber

Return type: Text

FormatDateLocale ( Date ( 7 ; 9 ; 2005 ) ; "DDDD, D MMMM YYYY" , "nl" ) returns "zaterdag, 9 juli 2005"

For Month and Day names, the function uses the functions DayNameList() and MonthNameList() to get the names in the specified language.
If the LocaleID parameter is an empty string, the systems Language is used.

Theo Ros

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


There is a problem here in that the function will replace the letters "D" and "M" in day or month names with the respective day or month number. For example,

FormatDateLocale ( "27.05.2007" ; "DD MMMM YYYY" ; "en" )

will produce

27 5ay 2007


FormatDateLocale ( "27.12.2007" ; "DD MMMM YYYY" ; "en" )

will result in

27 27ecember 2007

This can obviously be avoided by using escape characters (eg "#") around the formatstring patterns and parsing the formatstring accordingly:

"#MMMM#" instead of "MMMM"
"#DD#" instead of "DD"

Thanks for the function though. I work in a mixed language environment...

Cheers, V.

Vogel, Heidelberg
March 06, 2009 2:29am

Good solution. Only one escape character, not two, need be used. It's simpler:

"#MMMM" instead of "MMMM"

Adrian, UK
May 09, 2009 11:49am

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