What time is 21:58?


Solution

21:58 = 9:58 PM

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21:58 is 9:58 PM on a 12-hour clock and "21:58 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 21:58 through a time chart, automated calculator, and ways to convert by hand.

24-hour format 12-hour format
21:58 9:58 PM

21:58 conversion cheat sheet & time chart

A quick cheatsheet for all time conversions like 9:58 PM. Click the clock. Select your time. We'll highlight the row for the time you choose.

Morning Hours

Military Time Regular Time 24-Hour Time
0000 12:00 AM 00:00
0100 01:00 AM 01:00
0200 02:00 AM 02:00
0300 03:00 AM 03:00
0400 04:00 AM 04:00
0500 05:00 AM 05:00
0600 06:00 AM 06:00
0700 07:00 AM 07:00
0800 08:00 AM 08:00
0900 09:00 AM 09:00
1000 10:00 AM 10:00
1100 11:00 AM 11:00

Afternoon Hours

Military Time Regular Time 24-Hour Time
1200 12:00 PM 12:00
1300 01:00 PM 13:00
1400 02:00 PM 14:00
1500 03:00 PM 15:00
1600 04:00 PM 16:00
1700 05:00 PM 17:00
1800 06:00 PM 18:00
1900 07:00 PM 19:00
2000 08:00 PM 20:00
2100 09:00 PM 21:00
2200 10:00 PM 22:00
2300 11:00 PM 23:00

How to convert 21:58 from 24-Hour Time to 12-Hour Standard Time

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 21:58 to 12-hour time.

  1. First, determine whether or not 21 is greater than 12 (recall that this is one of the distinctions of the 12-hour clock, there are no hours "greater" than 12 on it)
  2. The hour 21 is higher than twelve, so we need to subtract 12 from 21 to get our "PM" hour: 21 - 12 = 9
  3. Now add "PM" to the end of the time: 9:58 PM

DID YOU KNOW?


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.

21 Hour Conversion Chart

24 Hour Clock 12 Hour Clock (AM/PM) Military Time
21:58 21:58 2158
22:03 22:03 2203
22:08 22:08 2208
22:13 22:13 2213
22:18 22:18 2218
22:23 22:23 2223
22:28 22:28 2228
22:33 22:33 2233
22:38 22:38 2238
22:43 22:43 2243
22:48 22:48 2248
22:53 22:53 2253
22:58 22:58 2258
23:03 23:03 2303
23:08 23:08 2308
23:13 23:13 2313