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Excel DAY Function

You are here: Home / Excel Functions / Excel DAY Function

The Excel DAY function returns the day of the month between 1 and 31 from a date serial number or text.

Syntax: =DAY(serial_number)

Where the serial_number is a date in a format Excel recognises, known as the date-time serial number.

Excel DAY Function Examples

Excel DAY Function

Tip: Rows 11:14 contain dates as text in column B, but DAY is still able to return the day! Don't rely on this though as results may be hit and miss.

You can also nest the DATE Function inside DAY, like so:

Formula: =DAY( DATE(2017,03,15) )
Result:    =15

Or DATEVALUE like so:

Formula: =DAY( DATEVALUE("2017/03/15") )
Result:    =15

You can also use the DAY function to populate the day argument of the DATE function e.g.

=DATE(2017,12,DAY(B9))

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Related Tutorials

Excel DATE Function Returns a date in serial number from separate year, month and day values
Excel DATEVALUE Function Converts a date text string to a date serial number.
Excel End of Period Dates Calculate fiscal period end dates
Excel TIME Function Returns a time serial number, from separate hour, minute and second values

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