0100 Military Time
0100 = 1:00 AM
Spoken aloud: “zero one 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 0100 means
0100 is 1:00 AM. Military time writes the hour and the minutes as four digits with no colon, so the 01 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.
One in the morning — deep in the mid watch at sea, the 0000–0400 shift that carries a ship through the night.
Saying 0100 out loud
You say “zero one hundred hours”. The word “hundred” is there because the minutes are zero; if it were 0130 you would say “zero one thirty hours” instead, and at 0105 it becomes “zero one oh five hours” — minutes below ten get an “oh”.
Common questions about 0100
What time is 0100 in regular time?
0100 is 1:00 AM on a 12-hour clock. The first two digits are the hour and the last two are the minutes, so 0100 means 1:00 AM exactly.
How do you say 0100 out loud?
0100 is spoken “zero one hundred hours”. The word “hundred” is used because the minutes are zero; at 0130 you would say “zero one thirty hours” instead.
Is 0100 AM or PM?
0100 is AM — it converts to 1:00 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.