2100 Military Time
2100 = 9:00 PM
Spoken aloud: “twenty-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 2100 means
2100 is 9:00 PM. Military time writes the hour and the minutes as four digits with no colon, so the 21 is the hour and the 00 is the minutes. Because the hour is 13 or higher, subtract 12 to get the time on a normal clock: 21 minus 12 is 9, so it is 9:00 PM.
Nine in the evening — the traditional lights-out warning in basic training.
Saying 2100 out loud
You say “twenty-one hundred hours”. The word “hundred” is there because the minutes are zero; if it were 2130 you would say “twenty-one thirty hours” instead, and at 2105 it becomes “twenty-one oh five hours” — minutes below ten get an “oh”.
Common questions about 2100
What time is 2100 in regular time?
2100 is 9:00 PM on a 12-hour clock. The first two digits are the hour and the last two are the minutes, so 2100 means 9:00 PM exactly.
How do you say 2100 out loud?
2100 is spoken “twenty-one hundred hours”. The word “hundred” is used because the minutes are zero; at 2130 you would say “twenty-one thirty hours” instead.
Is 2100 AM or PM?
2100 is PM — it converts to 9:00 PM. 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.