2331 military time is 11:31 PM

11:31 PM in every format

12-hour clock	11:31 PM
24-hour clock	23:31
Military time	2331 hours
Military pronunciation	twenty-three thirty-one hours
ISO 8601	T23:31:00
In words	Twenty-nine minutes to midnight
Part of the day	Night
Minutes since midnight	1,411
Day progress	97.99%

Military time uses four digits without a colon and counts hours from 00 to 23. 2331 is pronounced “twenty-three thirty-one hours”.

Hours 13–23 lose 12 and take PM: 23 − 12 = 11, so 23:31 → 11:31 PM.

When a time zone matters, the military adds a letter: 2331Z means 2331 in UTC, known as Zulu time.

2331 is 11:31 PM.

Say “twenty-three thirty-one hours”.