It worked in all previous IOS version, but v16 gives an error "I can't schedule events in the past" when using Siri to create an all-day event for the same day, it only allows a future day.
IOS 16 doesn't allow Siri to create all-day event on current day
Found the same problem with creating an event that started before current time. Sometimes we need to record things that is already in the process, I don't understand why apple would make a decision so that its customers can no longer use its calendar for something totally reasonable.