2231 in military time is 10:31 PM
- Say it
- Twenty-two thirty-one hours
- On the radio
- Two Two Three One Zulu
TOO TOO TREE WUN ZOO-LOO - Time of day
- In the night
Looking for the closest quarter hour? See 2230 (10:30 PM).
2231 from where you are
Checking your clock…
Working out your local time…
| Zone | Offset | Military | Regular |
|---|---|---|---|
| Zulu (UTC) | UTC+0 | 2231 | 10:31 PM |
| Eastern Daylight (Quebec) | UTC-4 | 1831 | 6:31 PM |
| Eastern Standard (Romeo) | UTC-5 | 1731 | 5:31 PM |
| Pacific Standard (Uniform) | UTC-8 | 1431 | 2:31 PM |
Where 2231 falls on a shift
Navy watches are fixed. Hospital shifts vary by facility; these are the common patterns.
| Mid watch | 0000–0400 |
| Morning watch | 0400–0800 |
| Forenoon watch | 0800–1200 |
| Afternoon watch | 1200–1600 |
| First dog watch | 1600–1800 |
| Last dog watch | 1800–2000 |
| First watch | 2000–2400 |
| Day shift, 12-hour | 0700–1900 |
| Night shift, 12-hour | 1900–0700 |
| Day shift, 8-hour | 0700–1500 |
| Evening shift, 8-hour | 1500–2300 |
| Night shift, 8-hour | 2300–0700 |
Every minute from 2200 to 2259
2231 questions
What is 2231 in regular time?
2231 in military time is 10:31 PM in regular 12-hour time. The hour 22 is over 12, so subtract 12 (22 − 12 = 10) and add PM: 10:31 PM.
How do you say 2231 in military time?
Say "twenty-two thirty-one hours." Over the radio, read it digit by digit: "Two Two Three One Zulu" when it is Zulu time.
What is 10:31 PM in military time?
10:31 PM is 2231 in military time, written with four digits and no colon.
Is 2231 AM or PM?
2231 is PM. Military times from 1200 to 2359 are after noon, so 2231 is 10:31 PM.
What is 2231 Zulu in US time?
2231Z (Zulu, UTC) is 5:31 PM Eastern Standard Time, 6:31 PM Eastern Daylight Time, and 2:31 PM Pacific Standard Time.
Need a different time? Use the converter or drill yourself for 60 seconds.