What time is 21:31?
👉 21:31 in 24-hour time is 9:31 PM in 12-hour time
9:31 PM in every format
| 12-hour clock | 9:31 PM |
|---|---|
| 24-hour clock | 21:31 |
| Military time | 2131 hours |
| Military pronunciation | twenty-one thirty-one hours |
| ISO 8601 | T21:31:00 |
| In words | Twenty-nine minutes to ten |
| Part of the day | Night |
| Minutes since midnight | 1,291 |
| Day progress | 89.65% |
How to convert 21:31 to 12-hour time
Hours 13–23 lose 12 and take PM: 21 − 12 = 9, so 21:31 → 9:31 PM.
9 PM is mid-evening, when many households start winding down and young children go to bed.
24-hour to 12-hour chart for 21:00–21:59
| 24-hour | 12-hour |
|---|---|
| 21:00 | 9:00 PM |
| 21:05 | 9:05 PM |
| 21:10 | 9:10 PM |
| 21:15 | 9:15 PM |
| 21:20 | 9:20 PM |
| 21:25 | 9:25 PM |
| 21:30 | 9:30 PM |
| 21:35 | 9:35 PM |
| 21:40 | 9:40 PM |
| 21:45 | 9:45 PM |
| 21:50 | 9:50 PM |
| 21:55 | 9:55 PM |
Questions about What time is 21:31?
What time is 21:31?
21:31 is 9:31 PM. Hours 13–23 lose 12 and take PM: 21 − 12 = 9, so 21:31 → 9:31 PM.