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previousMonthsDate ( theDate )

Calculate a date one month earlier with correct day

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Winfried Huslik Huslik Verlag GmbH http://www.fmchecker.com

  Function definition: (Copy & paste into FileMaker's Edit Custom Function window)

Let ( [ thisMonthFirst = Date ( Month ( theDate) ; 1 ; Year ( theDate ) ) ; prevMonthFirst = Date ( Month ( thisMonthFirst ) - 1 ; 1 ; Year ( thisMonthFirst ) ); prevMonthLast = Date ( Month ( thisMonthFirst ) ; 0 ; Year ( thisMonthFirst ) ) ]; Date ( Month ( prevMonthFirst ) ; Min ( Day ( prevMonthLast ); Day ( theDate ) ) ; Year ( prevMonthFirst ) ) ) Click to copy

Calculates a date within the previous month where the day is adjusted to a possible result, i.e. 3/31/2005 is converted to 2/28/2005.

 

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