Alternative form of eleventh hour

plural of rush hour

plural of witching hour

plural of book of hours

An illuminated Christian devotional book, popular in the Middle Ages.

The time at (or very close to) half the next hour of time.

A unit of energy, especially of electrical energy, equal to that done by one megawatt acting for one hour (abbreviation: MWh).

plural of zero hour

(idiomatic) A point in time or a relatively brief period of time when an especially distinguished, admirable, or effective set of actions is performed.

Around four to five o'clock in the morning.