12AM to Military Time
12AM = 0000
Spoken aloud: “zero hundred hours”
Convert another time
Type in either box — it converts as you type. Accepts 1300, 13:00, 1:00 PM, 0000 and 2400.
How 12AM becomes 0000
12:00 AM in military time is 0000. Midnight is the other exception: 12 AM becomes 0000, the start of the new day. A duty period that ends at midnight is written 2400 instead.
Midnight, and the start of a new day. Rosters closing out the previous day often write 2400 instead, but a new day always begins at 0000.
Writing it down
Four digits, no colon, no AM or PM: 0000. Spoken, that is “zero hundred hours”. If minutes are involved, they slot straight in without any change — 12:45 AM is 0045.
Common questions about 0000
What is 12AM in military time?
12AM in military time is 0000. Midnight is one of the two exceptions to the usual rules: 12 AM becomes 0000, not 1200.
How do you say 0000 out loud?
0000 is spoken “zero hundred hours”. The word “hundred” is used because the minutes are zero; at 0030 you would say “zero thirty hours” instead.
Is 0000 AM or PM?
0000 is AM — it converts to 12:00 AM. Military time has no AM or PM at all: every hour from 0000 to 2300 has its own number, which is the whole point of the format.