When does every Hour, 2, 4 or 6 Hours End?

I can control when a Fixed schedule begins watering, but if the frequency is every 1, 2, 4 or 6 hours, when does it Stop watering? I’d prefer not using Cycle & Soak, as it disables all other watering during the period.

I think it just keeps going until your stop date.

Really? Seems silly to have a start time then. Wonder what End before Sunrise or End Before Specific Time would do?