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DATEDIF Function

The DATEDIF function is one of the date and time functions. It is used to return the difference between two date values (start date and end date), based on the interval (unit) specified.


DATEDIF(start_date, end_date, unit)

The DATEDIF function has the following arguments:

Argument Description
start_date The starting date of a period.
end_date The ending date of a period.
unit The specified interval. The possible values are listed in the table below.

The unit argument can be one of the following:

Unit Interval Explanation
Y The number of complete years.
M The number of complete months.
D The number of days.
MD The difference between the days (months and years are ignored).
YM The difference between the months (days and years are ignored).
YD The difference between the days (years are ignored).


If the start_date is greater than the end_date, the result will be #NUM!.

How to apply the DATEDIF function.


There are three arguments: start-date = A1 = 3/16/2018; end-date = A2 = 9/16/2018; unit = "D". So the function returns the difference between two dates in days.

DATEDIF Function

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