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

WeekofFiscalYear( TheDate ; StartingDay ; StartMonth ; StartDay )

Rate this function:  

  Average rating: 4.4  (32 votes)
  Discuss this Custom Function

Jason L. DeLooze, Nocturnal MicroSystems

A generalization of FMP's WeekofYearFiscal( TheDate ; StartingDay ) in that this function allows the user to specify the starting month and day for the Fiscal Year (not the usual Jan 1st).

Sample Input:
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


A generalization of FMP's WeekofYearFiscal( TheDate ; StartingDay ) in that this function allows the user to specify the starting month and day for the Fiscal Year (not the usual Jan 1st).


TheDate: any valid date;

StartingDay: a number from 1 to 7, representing the first day of the week (1 -> Sun, 2 -> Mon, ..., 7 -> Sat).

StartMonth: a number from 1 to 12, representing the month marking the start of the Fiscal Year.

StartDay: a day number in StartMonth from 1 to last day of StartMonth, representing the day in StartMonth marking the start of the Fiscal Year.

Output: a number from 1 to 53 representing the week of the Fiscal Year in which TheDate falls.

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


I just wanted to say "thank you", this saved me a huge amount of time.

I have been trying to get the week numbers for dates we export to another system where they start their week numbereing on the last Monday of December!

Thank you for sharing.

Katy Butterworth, New Zealand
April 12, 2011 9:32pm

I've tried to do this my self numerous times, but never managed to get it quite right.

Saved me a lot of hassle,
Thanks very much!

Phil, Poole, UK
June 16, 2014 8:21am

Like Katy and Phil, Ive been trying to get this to work for ages. Thank you! :-D

Greg, Brisbane, Australia
April 05, 2016 4:22am

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 0 + 9 =
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. sql.getTable ( fullyQualifiedFieldObject )
  (Thu, Feb 22, 8:36am)
2. sql.getField ( fullyQualifiedFieldObject )
  (Thu, Feb 22, 8:34am)
3. FilterOut ( ListA ; ListB )
  (Wed, Feb 21, 6:11pm)
4. Char0 ( )
  (Sun, Feb 18, 2:35am)
5. CreateVCardFile ( FirstName ; LastName ; CompanyName ; Phone ; Email ; WEB ; hAddress1 ; hAddress2 ; hZip ; hCity ; hCountry ; wAddress1 ; wAddress2 ; wZip ; wCity%2
  (Sun, Feb 18, 1:50am)
6. AccurateAge (start; end )
  (Tue, Feb 13, 5:41am)
7. fnParser_UnCertain(text;firstSymbol;secondSymbol;SN)
  (Mon, Feb 12, 11:10pm)
8. sql.whereInList.asList ( fqFieldToReturn ; fqFieldToMatch ; listOfValuesToMatch )
  (Wed, Feb 07, 2:03pm)

RSS Feed of Custom Functions