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

WeekDayCountInMonth ( countThisWeekDayNum, dateInMonth )

Rate this function:  

  Average rating: 4.5  (19 votes)
  Discuss this Custom Function

Daniel A. Shockley, New York Hotel Trades Council

Returns the number of times a given weekday number appears in the month of the specified date.

Sample Input:
WeekDayCountInMonth ( 4, Date ( 8; 12; 2015 ) )
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


It can be useful to know things like "How many Thursdays are there in the calendar month August 2015?" This function allows you to answer that question easily. It's a simple algorithm I found on a page about Excel function somewhere.
You send in the week-day-number (i.e. 4, if you want to count Thursdays), along with some date (any date!) within the calendar month you want to check.
Another example, to find the number of today's day-of-week in today's month, would be:

WeekDayCountInMonth (
DayOfWeek ( Get ( CurrentDate ) )
; Get ( CurrentDate )

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 are no comments yet. Be the first to post 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 5 + 1 =
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. ExcludeValues(MyList ; Out)
  (Wed, Mar 21, 7:23am)
2. PreviousMonthEndDate ( myDate )
  (Wed, Mar 07, 3:35am)
3. PreviousMonthName (myDate)
  (Wed, Mar 07, 3:33am)
4. FmTableFields ( tableName ; fieldsInclude ; fieldsExclude ; classExclude ; typeExclude ; prefixExclude )
  (Fri, Mar 02, 6:32am)
5. sql.getTable ( fullyQualifiedFieldObject )
  (Thu, Feb 22, 8:36am)
6. sql.getField ( fullyQualifiedFieldObject )
  (Thu, Feb 22, 8:34am)
7. FilterOut ( ListA ; ListB )
  (Wed, Feb 21, 6:11pm)
8. Char0 ( )
  (Sun, Feb 18, 2:35am)

RSS Feed of Custom Functions