This article explains the behavior of time event with example:
I have a time event with info specified on the Calendar tab. For example, it says only trigger between 21:05 and 04:00. I activate the time event right now - and my expectation is that it will start triggering things at 21:05. However, when I go to the Details of the time event I see 2 things that I consider odd or unexpected:
1 - The Check Count is 1. Why would it have already checked? The conditions say don't start doing anything until 21:05 so wouldn't 21:05 be the first check?
2 - The Next Check value is 21:06:29. ???? Why on earth - before it even starts for the first time would it already be off by a minute and a half?