Military time, also called the 24-hour clock, is used by armed forces, aviation, hospitals, emergency services, and logistics operations worldwide. It eliminates the ambiguity of AM and PM by giving every hour of the day a unique number from 0000 to 2359.
Nurses and hospital staff use military time for shift schedules and medication records. A doctor's order reading "give at 1400" is unambiguous, whereas "2:00" could mean morning or afternoon. Electronic health record systems like Epic and Cerner display times in 24-hour format for this reason.
Pilots and air traffic controllers communicate entirely in military time. A flight plan listing departure at 1630Z means 4:30 PM UTC. The International Civil Aviation Organization (ICAO) requires 24-hour time for all aviation communications to prevent scheduling errors that could lead to mid-air conflicts.
Event coordinators managing international conferences use military time on shared schedules. When a team in Berlin sees a meeting listed at 1500 CET and a team in New York sees 0900 EST, both know it is the same moment without worrying about AM/PM confusion.
Logistics and supply chain teams use 24-hour timestamps for shipment tracking. A delivery window of 0800-1200 is clearer than 8:00 AM to 12:00 PM, especially when the same document is read by teams in different countries who may interpret 12:00 PM differently.
Converting from 12-hour to 24-hour time follows two simple rules. For AM times from 12:00 AM to 11:59 AM, the 24-hour equivalent is the same hours and minutes, except 12:00 AM becomes 00:00. For PM times from 12:00 PM to 11:59 PM, add 12 to the hour, except 12:00 PM stays as 12:00.
Converting from 24-hour to 12-hour time works in reverse. For hours 0000 to 1159, the 12-hour equivalent is the same (with 0000 becoming 12:00 AM). For hours 1200 to 2359, subtract 12 from the hour (with 1200 staying as 12:00 PM). Hours from 1300 onward get PM appended.
Military time is typically written without a colon: 1430 instead of 14:30. Spoken, it is read as "fourteen thirty." Hours with zero minutes are read as "hundred": 0800 is "zero eight hundred." Midnight can be written as either 0000 (start of day) or 2400 (end of day), though 0000 is more common in modern systems.
The 24-hour clock is the international standard defined by ISO 8601. Most countries use it as their primary civil time format. The United States, Canada, Australia, and a handful of other countries primarily use the 12-hour clock in daily life, which is why conversion tools are needed.
Input
2:30 PM
Output
1430 (fourteen thirty)
Afternoon meeting time, add 12 to the hour
Input
9:15 AM
Output
0915 (zero nine fifteen)
Morning shift start, same hour with leading zero
Input
12:00 AM (midnight)
Output
0000 (zero hundred)
Start of a new day, 12 AM becomes 0000
Input
12:00 PM (noon)
Output
1200 (twelve hundred)
Noon stays as 1200, do not add 12
Input
1745
Output
5:45 PM
Subtract 12 from hours 13-23, add PM
Input
0630
Output
6:30 AM
Hours 00-11 keep the same hour, add AM
Input
2300
Output
11:00 PM
Late evening, subtract 12 and add PM
Pitfalls to avoid
What is military time?
Military time is the 24-hour clock format where hours run from 00 to 23 instead of 1 to 12 with AM and PM. It is called "military time" because the US armed forces use it, but it is the standard time format in most countries and in fields like aviation, medicine, and logistics.
How do I convert PM times to military time?
For PM times from 1:00 PM to 11:59 PM, add 12 to the hour. For example, 3:00 PM becomes 1500, 7:30 PM becomes 1930. The exception is 12:00 PM (noon), which stays as 1200 without adding 12.
How do I convert AM times to military time?
For AM times from 1:00 AM to 11:59 AM, the hour stays the same with a leading zero if needed. 9:00 AM becomes 0900, 11:30 AM becomes 1130. The exception is 12:00 AM (midnight), which becomes 0000.
Is 0000 the same as 2400?
Both represent midnight. 0000 marks the start of a new day, while 2400 marks the end of the previous day. Most modern systems and standards use 0000. For example, a business open from 0800 to 0000 closes at midnight.
Why does the military use 24-hour time?
The 24-hour format eliminates AM/PM ambiguity, which is critical in military operations, aviation, and emergency services where confusion about morning vs. evening could have serious consequences. It also aligns with the ISO 8601 international standard.
Do all countries use military time?
Most countries use the 24-hour clock as their primary civil time format, including all of Europe, Asia, Africa, and Latin America. The 12-hour clock with AM/PM is primarily used in the United States, Canada, Australia, New Zealand, and a few other countries for everyday purposes.
How is military time spoken?
In the US military, times are read as "hundred" for zero minutes: 0800 is "zero eight hundred," 1400 is "fourteen hundred." With minutes, it is read as two pairs: 1430 is "fourteen thirty." In civilian contexts, many people simply say "fourteen thirty" or "fourteen hundred hours."
What is Zulu time?
Zulu time is military time in the UTC timezone, used in aviation and military coordination. The letter Z (phonetic alphabet: Zulu) indicates UTC. For example, 1400Z means 2:00 PM UTC. This allows forces in different timezones to reference a single common time.
Can military time include seconds?
Yes. The full format is HHMMSS, where seconds follow minutes. For example, 143045 means 2:30:45 PM. This format is used in precise timing applications like race timing, scientific data logging, and military operations orders.
Is military time the same as the 24-hour clock?
Yes. "Military time" and "24-hour clock" refer to the same timekeeping system. The term "military time" is mainly used in the United States. In most other countries, it is simply called the 24-hour clock or standard time.
The live clock uses your device's system clock and displays time in your local timezone. Military time conversion is a mathematical format change and does not involve timezone adjustments. For cross-timezone scheduling, use the Time Zone Converter.