0400 Military Time
0400 = 4:00 AM
Spoken aloud: “zero four hundred hours”
Convert another time
Type in either box — it converts as you type. Accepts 1300, 13:00, 1:00 PM, 0000 and 2400.
What 0400 means
0400 is 4:00 AM. Military time writes the hour and the minutes as four digits with no colon, so the 04 is the hour and the 00 is the minutes. The hour is below 12, so it is a morning time and the hour does not change — the leading zero is just padding to keep every time four digits long.
Four in the morning. Watch change at sea: the morning watch runs 0400–0800.
Saying 0400 out loud
You say “zero four hundred hours”. The word “hundred” is there because the minutes are zero; if it were 0430 you would say “zero four thirty hours” instead, and at 0405 it becomes “zero four oh five hours” — minutes below ten get an “oh”.
Common questions about 0400
What time is 0400 in regular time?
0400 is 4:00 AM on a 12-hour clock. The first two digits are the hour and the last two are the minutes, so 0400 means 4:00 AM exactly.
How do you say 0400 out loud?
0400 is spoken “zero four hundred hours”. The word “hundred” is used because the minutes are zero; at 0430 you would say “zero four thirty hours” instead.
Is 0400 AM or PM?
0400 is AM — it converts to 4:00 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.