Calculate a list of dates

I'm trying to let a sheet calculate a monthly date for a term. For example, there is a monthly billing contract for a term of 24 months. Currently, when building the billing sheet each date, 1/1/24, 2/1/24, etc. is entered manually. If we enter the first date, I can use the DATE formula and add 1 to the month, but when the sheet hits 12/1/24, the next entry is INVALID, because obviously, 13 is not a valid month. I can't seem to find another way to calculate a list of dates and return a valid date. I may be missing it or it's just not possible. Any help is appreciated.


  • Kelly Moore
    Kelly Moore ✭✭✭✭✭✭

    Hey @Linda Hoydic

    Try this

    =IF(MONTH([Your Date Column]@row) <> 12, DATE(YEAR([Your Date Column]@row), MONTH([Your Date Column]@row) + 1, DAY([Your Date Column]@row)), DATE(YEAR([Your Date Column]@row) + 1, 1, DAY([Your Date Column]@row)))

    you will need to edit the formula and change the date column to your actual column name

    Will this work for you?