We started using Aha! this year and are still building it out. I have just created Kanbans for my team and like having the Release Name and Date displayed; however, items in the Backlogs are also showing a date, which either makes it look like they released last February or last May, or are scheduled to release shortly.
A newly created Backlog is showing a default release date of Oct 2, 2017 and the Work Remaining calculations says 67d.
|Release time frame|