DATEDIF

Calculates the number of days, months, or years between two dates.

Sample Usage

DATEDIF(DATE(1969, 7, 16), DATE(1969, 7, 24), "D")

DATEDIF(A1, A2, "YM")

DATEDIF("7/16/1969", "7/24/1969", "Y")

Syntax

DATEDIF(start_date, end_date, unit)

• start_date - The start date to consider in the calculation. Must be a reference to a cell containing a DATE, a function returning a DATE type, or a number.

• end_date - The end date to consider in the calculation. Must be a reference to a cell containing a DATE, a function returning a DATE type, or a number.

• unit - A text abbreviation for unit of time. For example,"M" for month. Accepted values are "Y","M","D" ,"MD","YM","YD".

  • "Y": the number of whole years between start_date and end_date.

  • "M": the number of whole months between start_date and end_date.

  • "D": the number of days between start_date and end_date.

  • "MD": the number of days between start_date and end_date after subtracting whole months.

  • "YM": the number of whole months between start_date and end_date after subtracting whole years.

  • "YD": the number of days between start_date and end_date, assuming start_date and end_date were no more than one year apart.

Notes

• Months and years are only counted if they are equal to or go past the "day." For example, the function returns "4 months" between the dates 9/30/15 and 2/28/16 (even though the 28th is the last day of the month).

• If DATEDIF produces a result in an unexpected format, ensure that no pre-existing format has been applied to the cell. For example, if DATEDIF(DATE(1969,7,16),DATE(1969,7,24),"D") returns 1/4/1900, the Date format has been applied to the cell. Change the format of the cell to Number in order to view the expected result of 8.

• Use unit "MD" to answer questions such as, "After subtracting whole years and whole months from my age, how many days old am I?"

• Use unit "YM" to answer questions such as, "After subtracting whole years from my age, how many whole months old am I?"

• Use unit "YD" to answer questions such as, "How many days has it been since my last birthday, given my birthdate and today's date?"

See Also

DATE: Converts a year, month, and day into a date.

DATEVALUE: Converts a provided date string in a known format to a date value.

Examples

Make a copy

Note: Each example is in its own tab.

Number of days

In this example, DATEDIF returns the number of days in the Apollo 11 mission.

 

Months

In this example, DATEDIF returns the number of months in one year.