1] Add days directly If the expiry period is defined in days, you can calculate the expiry date by simply adding the number of days to the starting date using the + operator.

Learning how to subtract a date from today in Excel can help you find the number of days between a given date and today’s date.

Excel makes it easy to find how many days there are between two dates. With a little more effort, you can find the number of days in which people will be actually working.