We have had users, as well as staff, cancel requests by mistake or cancel the wrong dates. It would be great if the district admin had the option of undo cancel.
Adding a previous approved date requires restarting the approval and it emails each approver. Restarting the approval process takes too long and some approvers aren't always available. The option to undo a cancel would be specifically helpful for those dates that were already approved but were canceled by mistake. If it was a pending request, the undo cancel will restore the request back to pending.