Define Zero Hour Meaning

When a countdown is scheduled to end. Alternatively, a deadline.

Expansion pack to Command and Conquer: Generals. Very good game, but some people obsess over it and are really gay.

Doomsday, The Last Day.

When you are listening to the radio and there isnt good music, and when you only have the choice to listen to Kelly Clarkson!!!

when you wake up in the middle of the night from a bad nightmare

Addendum: Zero Hour referring to Midnite or the early AM.

A time at night where everyone's asleep. And this is the only time to get something done at the sacrafice of sleep.

The Zero Hour Theory states, that in the event of daylight savings time (taking place only during the “fall back” daylight saving switch) You are given an extra 59 minutes during your day. Not only are you given an extra 59 minutes, but…. In theory those extra 59 minutes never happened.

Think of it as this… for the 2010 Daylight Saving Time (taking place November 7th at 2am) the clock travels from 1:00 am to 1:59 am. When the clock is supposed to hit 2:00 am, it jumps all the way back to 1:00am (because you turn the clock back in fall vs. forward in spring). Thus giving you an extra 59 minutes (the first time the clock goes from 1:00am to 1:59), that theoretically never happened. So again, “in theory” for those 59 minutes that never exist, you should be able to do whatever you please, and get away with it….because hell they never happened. Look at this day as an excuse to celebrate and get a little extra crazy, go out and do something fun. Because in the Zero hour, anything goes.

***this is just a theory, not liable if you go murder someone or any of your actions for that matter***

A time to be ready that is considered too early in the morning. Usually, it is a time between 02:00 and 05:00 a.m.

In a similar context to the employment contract.
A zero hour contract dad is a father who is forced to adhere to limited hours with their child/children while in fear of being released from their "contract" basically having their child access stopped by a controlling mother.