Won’t let me select end before sunrise or specific time

I’d like to add my vote to have this turned back on. Would it be possible to have the calendar view show the planned schedule for the day, as you would see meeting times in outlook, so we could validate the schedule for the zones? As others have said, if I lump my whole yard into 1 schedule, it was over watering the shady zones due to the high temps and sun exposure in the dry zones.

I would really appreciate having these turned back on, thanks!