Count after an interval of days.

New Contributor

Hi, i do need an formula that can count days after an interval of 30 days between 2 dates.


Date A: December 1st

Date B: January 1st

Number of days after 30 days today: 27

Thank you.

3 Replies

Sorry, but I didn't catch what exactly means counting after the interval. After the last date in interval?


In general dates in Excel are just integer, as an example


returns 25 of today is Jan 26, 2019



I do have a term of 30 days, from date A to date B. I want to know how many delayed days are today after that term.


That will be


if date B is in cell B1.