Explanation

In Excel, dates are simply serial numbers.

Dates are valid through 9999, which is serial number 2,958,465.

This means that January 1, 2050 is the serial number 54,789.

Excel formula: Calculate time before expiration date

In the example, the date is March 9, 2016, which is the serial number 42,438.

Without TODAY

Note: you don’t need to use the TODAY function.

The TODAY function takes no arguments.

Excel formula: Calculate expiration date

you might format the value returned by TODAY with a datenumber format.

If you need current date and time, use…

Excel formula: Get workdays between dates

Excel TODAY function