Reference & AI

0100 Military Time

AR 25-50

0100 on the 24-hour clock is 1:00 AM. Every minute of the hour, the Zulu time by U.S. time zone and how to say it are below.

Reviewed by Guilherme Correia, active-duty U.S. Air Force

0100 in standard time

1:00 AM

Read aloud

zero one hundred

The hour before and after

0000 · 0200

Before noon the hour keeps its number: drop the leading zero and add a.m., so 0100 is 1:00 a.m.

0100 to 0159: every minute of the hour

The first two digits stay 01; the last two are the minutes.

0100 to 0114 in standard time
MilitaryStandard
01001:00 a.m.
01011:01 a.m.
01021:02 a.m.
01031:03 a.m.
01041:04 a.m.
01051:05 a.m.
01061:06 a.m.
01071:07 a.m.
01081:08 a.m.
01091:09 a.m.
01101:10 a.m.
01111:11 a.m.
01121:12 a.m.
01131:13 a.m.
01141:14 a.m.
0115 to 0129 in standard time
MilitaryStandard
01151:15 a.m.
01161:16 a.m.
01171:17 a.m.
01181:18 a.m.
01191:19 a.m.
01201:20 a.m.
01211:21 a.m.
01221:22 a.m.
01231:23 a.m.
01241:24 a.m.
01251:25 a.m.
01261:26 a.m.
01271:27 a.m.
01281:28 a.m.
01291:29 a.m.
0130 to 0144 in standard time
MilitaryStandard
01301:30 a.m.
01311:31 a.m.
01321:32 a.m.
01331:33 a.m.
01341:34 a.m.
01351:35 a.m.
01361:36 a.m.
01371:37 a.m.
01381:38 a.m.
01391:39 a.m.
01401:40 a.m.
01411:41 a.m.
01421:42 a.m.
01431:43 a.m.
01441:44 a.m.
0145 to 0159 in standard time
MilitaryStandard
01451:45 a.m.
01461:46 a.m.
01471:47 a.m.
01481:48 a.m.
01491:49 a.m.
01501:50 a.m.
01511:51 a.m.
01521:52 a.m.
01531:53 a.m.
01541:54 a.m.
01551:55 a.m.
01561:56 a.m.
01571:57 a.m.
01581:58 a.m.
01591:59 a.m.

0100 local time in Zulu (UTC)

From the FAA's table: add the hours shown to standard time, one hour less in daylight time.

0100 in each U.S. time zone, converted to Zulu time
0100 in this zoneStandard timeDaylight time
Eastern0600Z0500Z
Central0700Z0600Z
Mountain0800Z0700Z
Pacific0900Z0800Z
Alaska1000Z0900Z
Hawaii1100Z1000Z

How 0100 is written and said

AR 25-50, para. 1-26: "Military time will be expressed in a group of four digits, from 0001 to 2400, based on the 24–hour clock system. The first two digits represent the hour after midnight and the last two digits represent the minutes." So 0100 is hour 01, minute 00: 1:00 a.m.

Said aloud it is "zero one hundred". On paper the same paragraph says "The word "hours" will not be used in conjunction with military time," and that military time is used for memorandums while civilian time is used in letters.

Every hour in military time

For any other time, in either direction, use the military time converter.

Keep going

AR 25-50, Preparing and Managing Correspondence, para. 1-26 (10 October 2020, administrative revisions through 4 October 2024) · Federal Aviation Administration, Aeronautical Information Manual, Chapter 4, Section 2, paragraph 4-2-12, Time (read November 11, 2026)

Results are estimates. Always verify with your finance office.

Reviewed by Guilherme Correia · Military Toolkit editorial

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Official sources: AR 25-50 on armypubs.army.mil · FAA Aeronautical Information Manual, paragraph 4-2-12.