MILITARY TIME

Military time is a method of expressing time using a 24-hour clock — running from 0000 (midnight) through 2359 (one minute before the next midnight). Unlike the standard 12-hour clock that repeats each digit set twice per day and requires an AM or PM designation, military time assigns a unique four-digit number to every minute of the day.

The format is always four digits: the first two represent the hour (00-23) and the last two represent the minutes (00-59). So 0800 is 8 in the morning, 1400 is 2 in the afternoon, and 2200 is 10 at night. No guessing, no AM/PM required.

The term "military time" is mostly used in the United States. Internationally, the same system is simply called the 24-hour clock or ISO 8601 time notation. It's the default time format in most countries outside North America.

Who Uses Military Time?

Military time is used wherever precision matters. The armed forces, emergency services, hospitals, pilots, air traffic controllers, international shipping, and computing systems all use 24-hour format as standard.

How to Convert Military Time

For hours 00-11, military time and standard time are nearly identical — just add a colon and AM. For hours 12-23, subtract 12 and add PM. Use the converter tool or the complete chart for quick reference.

Three Rules for Reading Military Time

You only need three rules to read any military time:

1. Hours 0000–0059: This is the midnight hour. 0000 is 12:00 AM. Add minutes normally — 0030 is 12:30 AM.
2. Hours 0100–1159: These map directly to 1:00 AM through 11:59 AM. Drop any leading zero and add AM.
3. Hours 1200–2359: 1200 is noon. For 1300 and above, subtract 12 to get the PM hour. 1300 becomes 1:00 PM, 1800 becomes 6:00 PM, 2359 becomes 11:59 PM.

That's it. No exceptions, no special cases beyond midnight and noon. Once you internalize these three ranges, you can read any military time at a glance. For a more detailed walkthrough, see the complete guide to reading military time.

Military Time in Healthcare

Hospitals and clinical settings across the United States have adopted 24-hour time as a patient safety measure. When a medication order reads "give at 0800 and 2000," there is zero ambiguity about the 12-hour gap between doses. In contrast, a standard-time order for "8:00" could be misread as either AM or PM — a potentially dangerous error. The Joint Commission and the Institute for Safe Medication Practices (ISMP) both recommend 24-hour time notation in clinical documentation.

For nurses and healthcare workers, our nursing guide and healthcare reference cover shift schedules, charting conventions, and medication timing in detail.

Military Time Around the World

Outside the United States and a handful of other countries, the 24-hour clock is simply "how time works." Train schedules in Germany, flight departure boards in Japan, TV listings in Brazil — all use 24-hour format by default. The term "military time" is primarily an American convention. Internationally, it is called the 24-hour clock, and it is codified in the ISO 8601 standard used by computing systems, scientific research, and international commerce.

See which countries use which system on our countries page.