How do I prevent employees from setting up events or reminders after business hours?

The main reason is that frequently the person sets it for AM instead of PM. So the notification goes off while we are sleeping. Or when we get to work we think we missed it and have to fix it.

On a phone I can manage the alert but wouldn't it make sense to PREVENT an appointment or call to be setup after business hours?

If this is a feature, great! How do I do it? Such an obvious festure must already be an option right?

Off it's not an option yet then that's really odd!