ClockTotals

0100 Military Time Is 1:00 AM

By Sohail Manzoor · Updated

0100 = 1:00 AM

Zero one hundred

0100 in military time is 1:00 AM in standard time. Going the other way, 1 AM is written 0100. You say it “zero one hundred” or “zero one hundred hours”.

How to convert 0100 to standard time

The hour 01 is under 12, so it stays the same. Drop the leading zero, keep the minutes and add AM: 1:00 AM. To go back from 1 AM, write the hour with two digits, adding a zero in front, then the minutes, with no colon.

Where you see 0100

On the night US clocks fall back in November, they go from 0159 back to 0100. So the hour from 0100 to 0159 happens twice that night.

Times near 0100

MilitaryStandardSaid as
230011:00 PMTwenty-three hundred
231511:15 PMTwenty-three fifteen
233011:30 PMTwenty-three thirty
234511:45 PMTwenty-three forty-five
000012:00 AMZero hundred
001512:15 AMZero zero fifteen
003012:30 AMZero zero thirty
004512:45 AMZero zero forty-five
01001:00 AMZero one hundred
01151:15 AMZero one fifteen
01301:30 AMZero one thirty
01451:45 AMZero one forty-five
02002:00 AMZero two hundred
02152:15 AMZero two fifteen
02302:30 AMZero two thirty
02452:45 AMZero two forty-five
03003:00 AMZero three hundred

0100 Zulu (UTC) in US time zones

Add a Z, as in 0100Z, and the time is Zulu: UTC, the clock that aviation and the military share worldwide. Without the Z, 0100 is just local time.

ZoneIn winter (standard)In summer (daylight)
Eastern8:00 PM EST (day before)9:00 PM EDT (day before)
Central7:00 PM CST (day before)8:00 PM CDT (day before)
Mountain6:00 PM MST (day before)7:00 PM MDT (day before)
Pacific5:00 PM PST (day before)6:00 PM PDT (day before)
Alaska4:00 PM AKST (day before)5:00 PM AKDT (day before)
Hawaii3:00 PM HST (day before)No daylight saving

Every minute from 0100 to 0159

The last two digits are minutes, and they never change when you convert. Only the hour does, so every time from 0100 to 0159 sits in the 1 AM hour.

MilitaryStandardMilitaryStandardMilitaryStandardMilitaryStandard
01001:00 AM01151:15 AM01301:30 AM01451:45 AM
01011:01 AM01161:16 AM01311:31 AM01461:46 AM
01021:02 AM01171:17 AM01321:32 AM01471:47 AM
01031:03 AM01181:18 AM01331:33 AM01481:48 AM
01041:04 AM01191:19 AM01341:34 AM01491:49 AM
01051:05 AM01201:20 AM01351:35 AM01501:50 AM
01061:06 AM01211:21 AM01361:36 AM01511:51 AM
01071:07 AM01221:22 AM01371:37 AM01521:52 AM
01081:08 AM01231:23 AM01381:38 AM01531:53 AM
01091:09 AM01241:24 AM01391:39 AM01541:54 AM
01101:10 AM01251:25 AM01401:40 AM01551:55 AM
01111:11 AM01261:26 AM01411:41 AM01561:56 AM
01121:12 AM01271:27 AM01421:42 AM01571:57 AM
01131:13 AM01281:28 AM01431:43 AM01581:58 AM
01141:14 AM01291:29 AM01441:44 AM01591:59 AM

0100 military time questions

What is 0100 in regular time?

1:00 AM: 1 hour after midnight, with 23 hours to go before the next one.

What is 1 AM in military time?

0100. Morning hours just need two digits, so a zero goes in front.

Is 0100 AM or PM?

AM. Everything before 1200 is morning, and 0100 is 1 hour into the day.

How do you say 0100?

“Zero one hundred”, or “zero one hundred hours” on the radio. A leading 0 is said as zero rather than oh in most US services.

What is 0100 Zulu in Eastern Time?

In winter 0100Z is 8:00 PM in New York (EST) the day before. From the March clock change it is 9:00 PM EDT the day before, because the gap shrinks from 5 hours to 4.

Related pages

Page by Sohail Manzoor, Software Engineer and Full-Stack Developer. Every conversion here comes from one 24-hour formula, and automated tests run it on all 1,440 minutes of the day in both directions.

Cite this page

APA: ClockTotals. (2026, October 20). 0100 Military Time Is 1:00 AM. https://clocktotals.com/military-time/0100/

MLA: “0100 Military Time Is 1:00 AM.” ClockTotals, 20 Oct. 2026, clocktotals.com/military-time/0100/.

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