It should be possible to show only the schedule board from 17:00 (afternoon) until 8:00 (morning) for planners that specifically do the planning for night shifts. When I now try to configure this the system says it is not possible because the start date should be smaller than the end date.

So it should be possible to visualize the day in 2 parts, from 00:00 til 08:00 and the other from 17:00 until 24:00.