zero hour

The time at which something starts. I have so much studying left to do before the exam, and zero hour is 8 AM! Zero hour for our vacation is 4:30—the minute we're all done work!

Common Names:

Name	Pronounced	Usage
Lim	-	Chinese
Herodotus	-	Ancient Greek (Latinized)
Vlastimir	-	Serbian, Macedonian, Medieval Slavic
Joann
Atilius	-	Ancient Roman
Jessa	JES-ə	English