2100 military time is 9:00 PM
2100 military time is 9:00 PM, or nine o'clock at night. It is said aloud as "twenty-one hundred". It is late at night, 21 hours after midnight and 3 hours before the next midnight. With a colon, in the 24-hour clock most of the world writes, it is 21:00.
- Standard time
- 9:00 PM
- Said aloud
- twenty-one hundred
- 24-hour clock
- 21:00
- Part of the day
- Night
- After midnight
- 21 hours
- Until midnight
- 3 hours
How to convert 2100 military time to standard time
2100 is after noon, so subtract 12 from the hour: 21 minus 12 is 9. Keep the 00 minutes and add PM, which gives 9:00 PM. The same subtraction converts every military time from 1300 to 2359. To go the other way, add 12 to the hour of 9:00 PM: 9 plus 12 is 21, so 9:00 PM is 2100.
How to say 2100
2100 is said "twenty-one hundred". The hour is read as "twenty-one" and the 00 minutes become "hundred", which is why on-the-hour times sound like round numbers. You will hear "twenty-one hundred hours" too; the word is common in speech, though Army correspondence rules (AR 25-50, paragraph 1-26) leave it out in writing.
Hours from 2100 to common times
Timesheets ask this more than anything else: how long is it from 2100 to the end of the day, or from the start of a shift to 2100? The table counts the time in the natural direction, from the earlier time to the later one, and gives decimal hours for payroll.
| Between | Hours and minutes | Decimal hours |
|---|---|---|
| From 0000 (midnight, start of the day) to 2100 | 21 hours | 21 |
| From 0900 to 2100 | 12 hours | 12 |
| From 1200 (noon) to 2100 | 9 hours | 9 |
| From 1700 to 2100 | 4 hours | 4 |
| From 2100 to 2400 (midnight, end of the day) | 3 hours | 3 |
Open the converter with 2100 filled in
Times near 2100
The quarter hours of the hour before, the hour itself and the hour after, so you can read off a time a few minutes either side of 2100 without converting again.
| Military time | 24-hour clock | Standard time | Said aloud |
|---|---|---|---|
| 2000 | 20:00 | 8:00 PM | twenty hundred |
| 2015 | 20:15 | 8:15 PM | twenty fifteen |
| 2030 | 20:30 | 8:30 PM | twenty thirty |
| 2045 | 20:45 | 8:45 PM | twenty forty-five |
| 2100 | 21:00 | 9:00 PM | twenty-one hundred |
| 2115 | 21:15 | 9:15 PM | twenty-one fifteen |
| 2130 | 21:30 | 9:30 PM | twenty-one thirty |
| 2145 | 21:45 | 9:45 PM | twenty-one forty-five |
| 2200 | 22:00 | 10:00 PM | twenty-two hundred |
| 2215 | 22:15 | 10:15 PM | twenty-two fifteen |
| 2230 | 22:30 | 10:30 PM | twenty-two thirty |
| 2245 | 22:45 | 10:45 PM | twenty-two forty-five |
Is 2100 morning, afternoon, evening or night?
2100 is night by most people's reckoning: 9 hours after noon, 3 hours before the day ends at midnight. In 12-hour terms it is 9:00 PM. Evening shifts tend to finish and night shifts tend to start around here, which is why 2100 turns up so often on rotas and timesheets.
Questions people ask
What time is 2100 in military time?
2100 is 9:00 PM, nine o'clock at night. Subtract 12 from 21 to get 9, keep the minutes and add PM.
How do you say 2100 in military time?
"Twenty-one hundred". On the hour the two zero minutes are read as "hundred". In conversation people often add "hours" at the end.
Is 2100 AM or PM?
PM. Every military time from 1200 to 2359 is PM, and 2100 is 9 hours past noon. Military time never uses the letters, which is the point of it: 2100 can only mean one moment in the day.
How many hours is it from 2100 to midnight?
3 hours exactly, counting to 2400 at the end of the day. From 0900 to 2100 is 12 hours. The converter works out the time between any two military times, including across midnight.