0231 in military time is 2:31 AM
- Say it
- Zero two thirty-one hours
- On the radio
- Zero Two Three One Zulu
ZE-RO TOO TREE WUN ZOO-LOO - Time of day
- In the middle of the night
Looking for the closest quarter hour? See 0230 (2:30 AM).
0231 from where you are
Checking your clock…
Working out your local time…
| Zone | Offset | Military | Regular |
|---|---|---|---|
| Zulu (UTC) | UTC+0 | 0231 | 2:31 AM |
| Eastern Daylight (Quebec) | UTC-4 | 2231 | 10:31 PM the previous day |
| Eastern Standard (Romeo) | UTC-5 | 2131 | 9:31 PM the previous day |
| Pacific Standard (Uniform) | UTC-8 | 1831 | 6:31 PM the previous day |
Where 0231 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 0200 to 0259
0231 questions
What is 0231 in regular time?
0231 in military time is 2:31 AM in regular 12-hour time. The hour 02 is under 12, so drop the leading zero and add AM: 2:31 AM.
How do you say 0231 in military time?
Say "zero two thirty-one hours." Over the radio, read it digit by digit: "Zero Two Three One Zulu" when it is Zulu time.
What is 2:31 AM in military time?
2:31 AM is 0231 in military time, written with four digits and no colon.
Is 0231 AM or PM?
0231 is AM. Military times from 0000 to 1159 are before noon, so 0231 is 2:31 AM.
What is 0231 Zulu in US time?
0231Z (Zulu, UTC) is 9:31 PM the previous day Eastern Standard Time, 10:31 PM the previous day Eastern Daylight Time, and 6:31 PM the previous day Pacific Standard Time.
Need a different time? Use the converter or drill yourself for 60 seconds.