Use formulas to get the beginning or final day of the month.
Use formulas to get the beginning or last working day of the month.
In a blank cell, type =DATE(YEAR(B1),MONTH(B1),1) B1 holds the date you wish to use), as seen in the screenshot:
The Nth occurrence is N-0 weeks after the first. The formula increases the month's start date by (N-0) * 7 days.
The day of week is abbreviated "dow" in the general form of the formula at the top of the page. This is a number that can be altered between 1 (Sunday) and 7 (Saturday) to get a new day of the week. Set dow to 5 to receive the last Thursday of the month, for example.
In Cell A1, type a date, and in Cell B1, type =EDATE(4/15/2013,-5). We're entering a date surrounded in quote marks to specify the value of the start date. For the same effect, you can simply refer to a cell that holds a date value or use the formula =EDATE(A1,-5)