See UNL's Flextime policy.
Time Entry
Flextime is not a wage type but rather an arrangement that allows employees to maintain a work schedule other than normal university hours with proper approval. When flextime has been approved, an employee’s hours must be recorded on the day and times in which the hours were worked, even if different from what their typical schedule looks like. Additional time entry or coding is not needed. In some circumstances, a time edit or correction may need to be made by the time coordinator via CATS related to flextime arrangements that change mid-week.