Finding the Serial Number of the Last Day of the Month


Finding the day of the week matching the last day of each month (serial number) listed in column A.


Use the WEEKDAY and DATE functions as shown in the following formula:
Thus, the formula will return a number between 1 & 7 for each month in column A, where 1 represents Monday, and 7 represents Sunday.
To return 1 for Sunday and 7 for Saturday, modify your formula as follows:

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