Overtime is time outside of your normal working day - i.e. if you are normally working 08:30-17:30 but worked until 19:00 then it would show a start time of 17:30 and a finish time of 19:00.
Who is the overtime being logged for?
Date that you are logging it for
The start time of your overtime period
When did you finish the overtime period
Please provide a very brief summary of what was being done.