🕑 Current Time — Both Formats (Live)
24-Hour Format
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Military / International
12-Hour Format
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Standard AM/PM
Quick Examples
Enter time in 24-hour format (HH:MM)
Enter a valid 24-hour time.
hr
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min
Enter minutes 0–59
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Select AM for midnight–noon, PM for noon–midnight
Converted Time
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⚠️ Disclaimer: This converter follows the standard ISO 8601 and US DoD 24-hour time definitions. The special cases: 0000 = midnight start of day, 2400 = midnight end of day (both are 12:00 AM), 1200 = 12:00 PM noon. Results are for informational use. Always verify critical time-sensitive communications independently.
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Sources & Methodology
24-hour time conversion follows ISO 8601 international standard and US Department of Defense (DoD) Joint Publication 1-02 Military Time notation. All edge cases (0000, 1200, 2400) are handled per the official ISO 8601 and DoD definitions.
ISO 8601 — Date and Time Format Standard
ISO 8601 defines the 24-hour time notation used internationally. The format HH:MM:SS uses 00:00:00 for midnight (start of day) through 23:59:59 for the last second. The value 24:00:00 is also permitted to express the end of a calendar day. This is the basis for time display in all international computing, aviation, and scientific systems.
US DoD Joint Publication 1-02 — Military Time Standard
The US Department of Defense defines military time as a 4-digit format HHMM where the day runs from 0000 to 2359. Midnight is 0000 at the start of a day or 2400 at the end. The pronunciation uses "hundred" for exact hours and digit-by-digit for times with minutes. This is the standard for all US and NATO military operations.
Exact Conversion Algorithm (no ambiguity):
24-Hour 0000 → 12:00 AM (midnight, start of day) 24-Hour 0001-1159 → H:MM AM (remove leading zero for hours) 24-Hour 1200 → 12:00 PM (noon — special case, no subtraction) 24-Hour 1201-2359 → (H-12):MM PM (subtract 12 from hour) 24-Hour 2400 → 12:00 AM (midnight, end of day)
AM to 24-Hour: 12 AM = 0000; 1-11 AM = 0100-1100 (add leading zero) PM to 24-Hour: 12 PM = 1200; 1-11 PM = 1300-2300 (add 12 to hour) Minutes are never modified in any conversion. Seconds are included if present.
24-Hour 0000 → 12:00 AM (midnight, start of day) 24-Hour 0001-1159 → H:MM AM (remove leading zero for hours) 24-Hour 1200 → 12:00 PM (noon — special case, no subtraction) 24-Hour 1201-2359 → (H-12):MM PM (subtract 12 from hour) 24-Hour 2400 → 12:00 AM (midnight, end of day)
AM to 24-Hour: 12 AM = 0000; 1-11 AM = 0100-1100 (add leading zero) PM to 24-Hour: 12 PM = 1200; 1-11 PM = 1300-2300 (add 12 to hour) Minutes are never modified in any conversion. Seconds are included if present.
Last reviewed: April 2026
Military Time Guide — Complete Reference
Military time, also called the 24-hour clock, eliminates the ambiguity of AM and PM by counting all 24 hours of the day continuously from 0000 (midnight) to 2359 (11:59 PM). It is the international standard for aviation, medicine, computing, the military, and most countries worldwide. The United States is one of the few countries that primarily uses 12-hour AM/PM time in everyday life.
The Critical Edge Cases Most People Get Wrong
⚠️ The 4 special times you must know:
0000 = 12:00 AM (midnight, start of new day) — spoken: “zero hundred hours”
1200 = 12:00 PM (noon) — do NOT subtract 12; spoken: “twelve hundred hours”
2359 = 11:59 PM (last minute of the day) — spoken: “twenty-three fifty-nine”
2400 = 12:00 AM (midnight, end of day) — same as 0000 of the following day
0000 = 12:00 AM (midnight, start of new day) — spoken: “zero hundred hours”
1200 = 12:00 PM (noon) — do NOT subtract 12; spoken: “twelve hundred hours”
2359 = 11:59 PM (last minute of the day) — spoken: “twenty-three fifty-nine”
2400 = 12:00 AM (midnight, end of day) — same as 0000 of the following day
Complete Military Time Chart
How to Say Military Time — Pronunciation Guide
Military time is spoken by reading the four digits aloud, with specific rules:
- Exact hours: Say the hour number followed by “hundred” or “hundred hours”. 0900 = “zero nine hundred” or “oh nine hundred hours”. 1500 = “fifteen hundred”.
- Hours with minutes: Say the two-digit hour, then the two-digit minute. 1345 = “thirteen forty-five”. 0830 = “zero eight thirty”.
- Midnight: 0000 = “zero zero zero zero” or “zero hundred hours”. Never say “twenty-four hundred” for midnight (that is 2400, end of previous day).
- Leading zeros: Always pronounce the leading zero. 0600 = “zero six hundred” (not “six hundred”). 0030 = “zero zero thirty”.
- Seconds: In precise military communication, seconds are also stated: 143052 = “fourteen thirty hours and fifty-two seconds”.
Common Military Time Conversions
| Military Time | Standard Time | How to Say | Context |
|---|---|---|---|
| 0000 | 12:00 AM (midnight) | Zero hundred hours | Start of new day |
| 0600 | 6:00 AM | Zero six hundred | Morning formation |
| 0800 | 8:00 AM | Zero eight hundred | Business start |
| 1000 | 10:00 AM | Ten hundred | Morning meeting |
| 1200 | 12:00 PM (noon) | Twelve hundred | Noon/Lunch |
| 1300 | 1:00 PM | Thirteen hundred | Afternoon start |
| 1500 | 3:00 PM | Fifteen hundred | Afternoon |
| 1700 | 5:00 PM | Seventeen hundred | End of business |
| 1800 | 6:00 PM | Eighteen hundred | Evening |
| 2000 | 8:00 PM | Twenty hundred | Evening |
| 2100 | 9:00 PM | Twenty-one hundred | Lights out |
| 2359 | 11:59 PM | Twenty-three fifty-nine | Last minute |
Which Countries Use 24-Hour vs 12-Hour Time?
The 24-hour clock is the official standard in almost every country and is used globally for aviation, computing, scientific publications, and the military. The 12-hour AM/PM system is primarily used colloquially in the United States, Canada (informal speech), the Philippines, and parts of Australia and the United Kingdom. Here is how major regions compare:
- United States: 12-hour AM/PM dominant in everyday use; 24-hour used by military, hospitals, aviation, and emergency services
- United Kingdom: Both systems used — 24-hour on timetables and official contexts; 12-hour in conversation
- Europe (EU): 24-hour standard across all countries for all official use
- Pakistan, India, Bangladesh: 12-hour AM/PM colloquially; 24-hour in official, railway, and aviation contexts
- Japan: Both systems widely used; digital displays typically show 24-hour
- Australia: Mixed use; 24-hour in transport, 12-hour in everyday speech
- All aviation worldwide: 24-hour UTC used exclusively for all flight plans and ATC communication
Frequently Asked Questions
For 0000: = 12:00 AM. For 0001–1159: keep hours the same and add AM. For 1200: = 12:00 PM (noon). For 1201–2359: subtract 12 from hours and add PM. Example: 1800 − 12 = 6, so 1800 = 6:00 PM.
1300 military time = 1:00 PM. Subtract 12: 13 − 12 = 1. Spoken: “thirteen hundred hours.” This is the first hour of the afternoon in 24-hour format.
1500 = 3:00 PM. 15 − 12 = 3. Spoken: “fifteen hundred hours.” A common afternoon meeting time.
1800 = 6:00 PM. 18 − 12 = 6. Spoken: “eighteen hundred hours.” Typical dinner or evening start time in military scheduling.
0000 = 12:00 AM midnight (start of the day). Spoken: “zero hundred hours.” This is the beginning of a new calendar day. 2400 is also midnight but marks the end of the previous day. Both represent the same clock moment but have different day associations.
1200 = 12:00 PM (noon). This is a special case — do NOT subtract 12. 1200 is noon. 1201 = 12:01 PM. 1159 = 11:59 AM. Spoken: “twelve hundred hours.”
For exact hours: say the number followed by “hundred” or “hundred hours.” 0900 = “zero nine hundred.” 1500 = “fifteen hundred.” For times with minutes: say both groups of digits. 1345 = “thirteen forty-five.” 0830 = “zero eight thirty.” Always say leading zeros: 0600 = “zero six hundred.”
2100 = 9:00 PM. 21 − 12 = 9. Spoken: “twenty-one hundred hours.” A common evening or lights-out time in military contexts.
For PM times (except 12 PM), add 12 to the hour: 3 + 12 = 15. Keep the minutes: 45. So 3:45 PM = 1545 military time. Spoken: “fifteen forty-five hours.”
1700 = 5:00 PM. 17 − 12 = 5. Spoken: “seventeen hundred hours.” Often marks end of business hours or shift changes in military and medical settings.
0800 = 8:00 AM. Hours 0100–1159 are AM hours and convert directly. 0800 = 8:00 AM. Spoken: “zero eight hundred hours.” A common morning formation or report time.
The 24-hour clock eliminates ambiguity between AM and PM. In high-stakes environments like surgery, medication scheduling, or military operations, confusing 1:00 AM and 1:00 PM could be catastrophic. The 24-hour format removes this risk entirely by making every time of day unique. It is also the ISO 8601 international standard, enabling unambiguous global coordination.
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