What is military time?
Military time uses a 24-hour clock instead of the 12-hour clock. The day starts at 0000 (midnight) and runs to 2359 (11:59 PM), and every hour has its own number, so there's no AM or PM.
Source North Carolina Office of State Fire Marshal · Military time (chart) ↗
How to convert military time
Here it is with your numbers:
- The hour is 17, more than 12, so take away 12: 17 − 12 = 5.
- Hours 12 to 23 are PM: 5:45 PM.
It means 17:45 on a 24-hour schedule is 5:45 PM on a 12-hour clock.
For PM times, add 12 to the hour: 3 PM is 3 + 12 = 15, written 1500. For military hours 13 to 23, take 12 away to get the PM hour.
Noon and midnight
"12 AM" and "12 PM" confuse people, so the National Institute of Standards and Technology (NIST) suggests "noon" and "midnight" instead. A clock switches to PM the moment it reaches 12:00 noon, so 12:00 PM is noon (1200) and 12:00 AM is midnight (0000). On the 24-hour clock, 0000 is midnight at the start of a day and 2400 is midnight at the end of it.
Source NIST Time and Frequency Division · Times of Day FAQs (noon and midnight) ↗
Military time chart
| 12-hour time | Military time |
|---|---|
| 12:00 AM (midnight) | 0000 |
| 1:00 AM | 0100 |
| 2:00 AM | 0200 |
| 3:00 AM | 0300 |
| 4:00 AM | 0400 |
| 5:00 AM | 0500 |
| 6:00 AM | 0600 |
| 7:00 AM | 0700 |
| 8:00 AM | 0800 |
| 9:00 AM | 0900 |
| 10:00 AM | 1000 |
| 11:00 AM | 1100 |
| 12:00 PM (noon) | 1200 |
| 1:00 PM | 1300 |
| 2:00 PM | 1400 |
| 3:00 PM | 1500 |
| 4:00 PM | 1600 |
| 5:00 PM | 1700 |
| 6:00 PM | 1800 |
| 7:00 PM | 1900 |
| 8:00 PM | 2000 |
| 9:00 PM | 2100 |
| 10:00 PM | 2200 |
| 11:00 PM | 2300 |
Minutes stay the same: 5:45 PM is 1745, and 12:30 AM is 0030.
FAQs
What is 17:00 military time?
1700 is 5:00 PM. For hours after 12, take away 12 to get the PM hour: 17 − 12 = 5.
Source North Carolina Office of State Fire Marshal · Military time (chart) ↗
What is 22:00 in military time?
2200 is 10:00 PM (22 − 12 = 10). Going the other way, add 12 to any PM hour from 1 to 11: 10 PM is 10 + 12 = 22, written 2200.
What is 14 in military time?
Hour 14 is 2 PM, written 1400 in military time. Hours 13 to 23 are PM: 14 − 12 = 2.
What time is 12:17 PM in military time?
1217. The noon hour keeps its 12: only PM hours from 1 to 11 get 12 added. Just after midnight, 12:17 AM, is 0017.
Source NIST Time and Frequency Division · Times of Day FAQs (noon and midnight) ↗
Sources
- North Carolina Office of State Fire Marshal: Military time (chart)
- NIST Time and Frequency Division: Times of Day FAQs (noon and midnight)