Software Venture Consulting

FileMaker Pro downloads & Resources
FileMaker Custom Functions
FileMaker Web Viewer Examples
FileMaker Pro & Lasso Consulting
FileMaker Books
FileMaker Articles
FileMaker Error Reference

Free Web Tools
Free FileMaker Tools

Personal Pages

Shopping Cart
Shopping Cart


Free Newsletter


Privacy Policy

FileMaker is a registered trademark of FileMaker, Inc. in the U.S. and other countries.


 FileMaker Pro Custom Functions

List  |  Show Random  |  Upload  |  Add This to Your Site

BusinessDays ( startDate ; endDate )

Rate this function:  

  Average rating: 4.2  (39 votes)
  Discuss this Custom Function

Jeremy Bante,

Returns the number of business days between two dates (inclusive)

Sample Input:
BusinessDays ( Date ( 11 ; 10 ; 2011 ) ; Date ( 11 ; 30 ; 2012 ) )
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


This function returns the number of business days (non-holiday weekdays) between startDate and endDate (including both startDate and endDate).

This function is dependent on the BusinessHolidays ( calendarYear ) function to produce a list of observed holidays in a given year.

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


Business Days() imposes a severe performance hit of several seconds if the startDate parameter is empty, and returns a ? as the result.

I added a case statement to a modified version of the function so that if the startDate or endDate are empty, or the endDate<startDate, the function returns a null value and doesn't try to evaluate - viz:

IsEmpty(endDate);"&qu ot;;

Let ...



Brian Rich, Hampshire UK
February 22, 2012 2:25am

Thank you for letting me know. Normally I prefer to let the consequences of bad input filter through, but performance is different. I opted to return "?" rather than null to be consistent with error behavior for FileMaker-native functions.

Jeremy Bante, USA
February 22, 2012 5:19am

can i have coding for buisness days function?

aruna, india
November 29, 2013 4:45am

Make a comment about this Custom Function (please try to keep it brief & to the point). Anyone can post:

Your Name:
characters left. If you paste in more than 1500 characters, it will be truncated. Discuss the function - advertisements and other useless posts will be deleted.
Answer 3 + 6 =
Search for Custom Functions:

Custom Functions Widget
Download the Custom Function Dashboard Widget for OS X
Keep all the latest Custom Functions right at your fingertips!

Newest Custom Functions:

1. PreviousMonthEndDate ( myDate )
  (Wed, Mar 07, 3:35am)
2. PreviousMonthName (myDate)
  (Wed, Mar 07, 3:33am)
3. FmTableFields ( tableName ; fieldsInclude ; fieldsExclude ; classExclude ; typeExclude ; prefixExclude )
  (Fri, Mar 02, 6:32am)
4. sql.getTable ( fullyQualifiedFieldObject )
  (Thu, Feb 22, 8:36am)
5. sql.getField ( fullyQualifiedFieldObject )
  (Thu, Feb 22, 8:34am)
6. FilterOut ( ListA ; ListB )
  (Wed, Feb 21, 6:11pm)
7. Char0 ( )
  (Sun, Feb 18, 2:35am)
8. CreateVCardFile ( FirstName ; LastName ; CompanyName ; Phone ; Email ; WEB ; hAddress1 ; hAddress2 ; hZip ; hCity ; hCountry ; wAddress1 ; wAddress2 ; wZip ; wCity%2
  (Sun, Feb 18, 1:50am)

RSS Feed of Custom Functions