2330 military time
2330 = 11:30 PM
2330 is half past 11 at night. With a colon it is 23:30.
Convert another time
How to read 2330
2330 is after noon, so subtract 12 from the hours: 23 − 12 = 11. Keep the minutes (30) and add PM: 11:30 PM. Do not subtract 10: 2330 is not 13:30 PM.
For hours 20 to 23, add 8 to the second digit: 23 gives 3 + 8 = 11, PM.
2330 falls in the night: 23 hours and 30 minutes after midnight, 97.9% of the way through the day, with 30 minutes left until the next midnight.
How to say it
Pilots and air traffic controllers say each digit: “two three three zero”. Off the radio, people usually read 2330 as two numbers.
Counting hours to and from 2330
Start and end times on a timesheet come down to this subtraction. The decimal column is the form many payroll systems want; the minutes to decimal chart covers every minute.
| Start | Length | Decimal |
|---|---|---|
| 0600 | 17 h 30 min | 17.50 |
| 0700 | 16 h 30 min | 16.50 |
| 0800 | 15 h 30 min | 15.50 |
| 0900 | 14 h 30 min | 14.50 |
| Add | Military | 12-hour |
|---|---|---|
| 1 h | 0030 | 12:30 AM (next day) |
| 2 h | 0130 | 1:30 AM (next day) |
| 4 h | 0330 | 3:30 AM (next day) |
| 8 h | 0730 | 7:30 AM (next day) |
| 10 h | 0930 | 9:30 AM (next day) |
| 12 h | 1130 | 11:30 AM (next day) |
2330Z: the same moment in other time zones
Written 2330Z, the time is in UTC, and the local clock depends on the zone and the season.
| Zone | Standard time | Summer time |
|---|---|---|
| US Eastern (New York) | 6:30 PM UTC−5 | 7:30 PM UTC−4 |
| US Central (Chicago) | 5:30 PM UTC−6 | 6:30 PM UTC−5 |
| US Mountain (Denver) | 4:30 PM UTC−7 | 5:30 PM UTC−6 |
| US Pacific (Los Angeles) | 3:30 PM UTC−8 | 4:30 PM UTC−7 |
| Alaska (Anchorage) | 2:30 PM UTC−9 | 3:30 PM UTC−8 |
| Hawaii (Honolulu) | 1:30 PM UTC−10 | no change |
| UK (London) | 11:30 PM UTC+0 | 12:30 AM (next day) UTC+1 |
| Central Europe (Berlin) | 12:30 AM (next day) UTC+1 | 1:30 AM (next day) UTC+2 |
| India | 5:00 AM (next day) UTC+5:30 | no change |
| Japan and South Korea | 8:30 AM (next day) UTC+9 | no change |
| Australia East (Sydney) | 9:30 AM (next day) UTC+10 | 10:30 AM (next day) UTC+11 |
For a particular date and city, use the time zone converter, which applies the exact daylight saving dates.
Nearby military times
The full chart is on the military time page.