What is 12:21 AM in 24-hour time?
👉 12:21 AM is 00:21 in 24-hour time and 0021 in military time
12:21 AM in every format
| 12-hour clock | 12:21 AM |
|---|---|
| 24-hour clock | 00:21 |
| Military time | 0021 hours |
| Military pronunciation | zero zero twenty-one hours |
| ISO 8601 | T00:21:00 |
| In words | Twenty-one minutes past midnight |
| Part of the day | Night |
| Minutes since midnight | 21 |
| Day progress | 1.46% |
How to convert 12:21 AM to 24-hour time
For AM times keep the hour (12 AM becomes 00): 12:21 AM → 00:21.
Midnight starts a new calendar day. Date-based deadlines, daily counters and many scheduled computer jobs reset during this hour, and most people are asleep.
12-hour to 24-hour chart for 12 AM
| 12-hour | 24-hour | Military |
|---|---|---|
| 12:00 AM | 00:00 | 0000 |
| 12:05 AM | 00:05 | 0005 |
| 12:10 AM | 00:10 | 0010 |
| 12:15 AM | 00:15 | 0015 |
| 12:20 AM | 00:20 | 0020 |
| 12:25 AM | 00:25 | 0025 |
| 12:30 AM | 00:30 | 0030 |
| 12:35 AM | 00:35 | 0035 |
| 12:40 AM | 00:40 | 0040 |
| 12:45 AM | 00:45 | 0045 |
| 12:50 AM | 00:50 | 0050 |
| 12:55 AM | 00:55 | 0055 |
Questions about What is 12:21 AM in 24-hour time?
What is 12:21 AM in 24-hour time?
12:21 AM is 00:21. For AM times keep the hour (12 AM becomes 00): 12:21 AM → 00:21.