21:30 is 9:30 PM on a 12-hour clock and "21:30 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 21:30 through a time chart, automated calculator, and ways to convert by hand.
24-hour format | 12-hour format |
---|---|
21:30 | 9:30 PM |
A quick cheatsheet for all time conversions like 9:30 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 21:30 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 |
---|---|---|
21:30 | 21:30 | 2130 |
21:35 | 21:35 | 2135 |
21:40 | 21:40 | 2140 |
21:45 | 21:45 | 2145 |
21:50 | 21:50 | 2150 |
21:55 | 21:55 | 2155 |
22:00 | 22:00 | 2200 |
22:05 | 22:05 | 2205 |
22:10 | 22:10 | 2210 |
22:15 | 22:15 | 2215 |
22:20 | 22:20 | 2220 |
22:25 | 22:25 | 2225 |
22:30 | 22:30 | 2230 |
22:35 | 22:35 | 2235 |
22:40 | 22:40 | 2240 |
22:45 | 22:45 | 2245 |