DAYS Function in Excel returns the number of days between two dates.

**Syntax of DAYS Function in Excel:**

=DAYS(end_date,start_date)

- First Argument is End date
- Second Argument is Start date

**Example of DAYS Function in Excel:**

**Formula:**

- Row number 2 calculates Difference between Jan-1-2017 to Feb-1-2017 which are 31 days
- Start Date has to be less than end date or else it will result in negative vale which -31 days in row number 3.
- If Start Date and End Date are same then difference between two days will be 0 days Which is shown in row number 4
- Row number 5 calculates difference between Feb-1-2015 to Feb-1-2017, which is 731 days

**Results:**

**Note on Errors of DAYS Function in Excel:**

**#NUM!**– Occurs if one or both of the supplied end_date and start_date arguments are numeric values, but are not recognized as valid dates.**#VALUE!**– Occurs if one or both of the supplied start_date and end_date arguments are text values that cannot be interpreted as dates.