Aivie allows the use of relative dates such as “-2 weeks” when creating and filtering segments for active contacts.
Here is an example of how to filter out all leads that have been active in the last 2 weeks:

Other possible values are e.g.
+1 day / 1 day
-2 days / 2 days ago
+1 week / -2 weeks / 3 weeks ago
+5 months / -6 months / 7 months ago
+1 year / -2 years / 3 years ago
Note: If the relative value is not recognized, the current date is displayed after saving.

