04:39 is 4:39 AM on a 12-hour clock and "04:39 Hours" in Military Time. We use this system throughout the world (not just the military) and leverages a 24-hour time clock rather than the 12-hour AM/PM system known to most English-speaking countries. Below are ways to convert 04:39 through a time chart, automated calculator, and ways to convert by hand.
| 24-hour format | 12-hour format |
|---|---|
| 04:39 | 4:39 AM |
A quick cheatsheet for all time conversions like 4:39 AM. Click the clock. Select your time. We'll highlight the row for the time you choose.
It is easy to convert from 24-hour time to 12-hour time once you know a few tricks. The primary difference between the two is that the hours in a 24-hour clock go all the way up to 23 (from 0 to 23). In a 12-hour clock, the hour resets to 1 after noon (midday). Follow the steps below to convert 04:39 to 12-hour time.
24-hour time is used in aviation, military, meteorology, logistics, and other fields. The 12-hour clock is only used in 18 countries globally, including the United States and Canada. 24-hour time and military time are very similar! See our military time converter for more information.
| 24 Hour Clock | 12 Hour Clock (AM/PM) | Military Time |
|---|---|---|
| 04:39 | 4:39 | 0439 |
| 04:44 | 4:44 | 0444 |
| 04:49 | 4:49 | 0449 |
| 04:54 | 4:54 | 0454 |
| 04:59 | 4:59 | 0459 |
| 05:04 | 5:04 | 0504 |
| 05:09 | 5:09 | 0509 |
| 05:14 | 5:14 | 0514 |
| 05:19 | 5:19 | 0519 |
| 05:24 | 5:24 | 0524 |
| 05:29 | 5:29 | 0529 |
| 05:34 | 5:34 | 0534 |
| 05:39 | 5:39 | 0539 |
| 05:44 | 5:44 | 0544 |
| 05:49 | 5:49 | 0549 |
| 05:54 | 5:54 | 0554 |