I have one field for a permit decision date, and then I have another field for 180 days from that permit date. The permit date field has data entered, but the 180 day field I would like to calculate by adding 180 days. It is a feature class in a file GDB, and both fields are in date format (mm/dd/yyyy).

Example: Permit Field date is 7/1/2009, I would like the 180 days field to be 12/28/2009.

I am using ArcGIS 10.2.2 for Desktop.

  • It is ArcGIS for Desktop 10.2.2 Dec 29, 2014 at 15:55

1 Answer 1


Pretty sure this is what you are looking for:

Simplify Date and Time Calculations

Calculating a Past or Future Date If your features have a single date and time, and you need to calculate a second date or time relative to the first, use the DateAdd function. It adds or subtracts a specific interval from the original date and returns the resulting second date.


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