20:21 is 8:21 PM on a 12-hour clock and "20:21 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 20:21 through a time chart, automated calculator, and ways to convert by hand.
24-hour format | 12-hour format |
---|---|
20:21 | 8:21 PM |
A quick cheatsheet for all time conversions like 8:21 PM. 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 20:21 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 |
---|---|---|
20:21 | 20:21 | 2021 |
20:26 | 20:26 | 2026 |
20:31 | 20:31 | 2031 |
20:36 | 20:36 | 2036 |
20:41 | 20:41 | 2041 |
20:46 | 20:46 | 2046 |
20:51 | 20:51 | 2051 |
20:56 | 20:56 | 2056 |
21:01 | 21:01 | 2101 |
21:06 | 21:06 | 2106 |
21:11 | 21:11 | 2111 |
21:16 | 21:16 | 2116 |
21:21 | 21:21 | 2121 |
21:26 | 21:26 | 2126 |
21:31 | 21:31 | 2131 |
21:36 | 21:36 | 2136 |