Military Time

Military Time

https://military.onlineclock.net/chart/

9:00 a.m.	0900 or 0900 hours	"Zero nine hundred hours"
5:00 p.m.	1700 or 1700 hours	"Seventeen hundred hours"

12:00 a.m. is usually referred to as both 0000 and 2400 hours. Clocks which can display Military Time, however, always display this time of day as 0000 (and not as 2400).

Zulu Time

Another name for UTC or GMT time.

In the Military Phonetic Alphabet "Z" is Zulu. The 24 time zones are labeled A through Z. The 24th time zone is +0, and is therefore called Zulu Time.