Hello @Ronan,   Yes. This is possible. The only pre-requisites are: 1.) You must have an auto-number field in your table. 2.) Date1 and Date2 should have a DataType of Date/Time.   Once these requirements are met, you just need to add a formula field to your table. The syntax would be as follows: CASE WHEN [@field:Date2] < [@field:Date1] THEN CAST( 'a' + 1 as INT) END   Works for me.   Hope this helps. -DN31337