Understanding daypart

when making a daypart, you can read:
Enter the end time for this daypart. If the end time is after the start time, then the daypart will cross midnight.

What does that mean ??? My daypart goes from 07:00 - 19:00, the end time is after the start time ---- and now the daypart goes cross midnight ??

btw: daypart scheduling in 1.8.1 does not work for me, I will make further tests and post here

Dayparts are blocks of time in the day - if your day part is 22:00 to 02:00, Xibo understands that is a 4 hour period that crosses midnight.

07:00 to 19:00 crosses midday, not midnight, if you see what I mean?

this is the text within the Dialog window.

ok, when daypart is 22:00 to 02:00, then the end time is BEFORE the start time and therefore daypart will cross midnight

Thanks Walter