How to Pronounce Military Time
Updated June 20, 2026
There are two ways to speak 24-hour time: the military style used by armed forces and emergency services, and the civilian style used in countries where 24-hour time is the default. In military speech, 1730 is "seventeen thirty hours." In civilian speech, someone in Paris seeing 17:30 on a sign will usually say "cinq heures trente." They convert to 12-hour. This guide covers both.
Direct answer
Military: split the four digits into two pairs and say each as a number. 0000 = "zero hundred," 0600 = "zero six hundred," 1200 = "twelve hundred," 1730 = "seventeen thirty." Add "hours" for formality. Civilian 24-hour: say the hour and minutes as two numbers (18:30 = "eighteen thirty"), or convert to 12-hour in conversation. Both are correct. Use the converter to check any time.
Military time pronunciation: the rules
Military time is always written as four digits with no colon. To say it, split into two two-digit groups and pronounce each group as its own number. Never say it digit by digit.
Correct
1730 = "seventeen thirty"
Wrong
"one seven three zero"
Wrong
"seventeen three zero"
The word "hundred" is only used when the last two digits are 00, a full hour. For 0600, say "zero six hundred." For 1200, say "twelve hundred." But for 0615, say "zero six fifteen" or "oh six fifteen." Never "zero six hundred fifteen." For 1730, say "seventeen thirty," not "seventeen hundred thirty."
Adding "hours" at the end makes it formal. "Zero six hundred hours" is standard in military briefings. In casual conversation, people drop it. "Zero six hundred" is fine.
Full pronunciation table
| Written | Military (spoken) | Civilian 24h (spoken) | 12-hour |
|---|---|---|---|
| 0000 / 00:00 | Zero hundred (hours) | Midnight | 12:00 AM |
| 0030 / 00:30 | Zero thirty | Zero thirty or twelve thirty AM | 12:30 AM |
| 0600 / 06:00 | Zero six hundred / oh six hundred | Six or six AM | 6:00 AM |
| 0800 / 08:00 | Zero eight hundred / oh eight hundred | Eight or eight AM | 8:00 AM |
| 0900 / 09:00 | Zero nine hundred / oh nine hundred | Nine or nine AM | 9:00 AM |
| 1200 / 12:00 | Twelve hundred | Twelve or noon | 12:00 PM |
| 1400 / 14:00 | Fourteen hundred | Fourteen hundred or two PM | 2:00 PM |
| 1500 / 15:00 | Fifteen hundred | Fifteen hundred or three PM | 3:00 PM |
| 1730 / 17:30 | Seventeen thirty | Seventeen thirty or five thirty PM | 5:30 PM |
| 1830 / 18:30 | Eighteen thirty | Eighteen thirty or six thirty PM | 6:30 PM |
| 2100 / 21:00 | Twenty-one hundred | Twenty-one hundred or nine PM | 9:00 PM |
| 2345 / 23:45 | Twenty-three forty-five | Twenty-three forty-five or eleven forty-five PM | 11:45 PM |
Civilian pronunciation: how the world says 24-hour time
About 18 countries and many more institutions use 24-hour time as the standard. But everyday speech varies a lot.
Western Europe (France, Germany, Netherlands, Belgium, Switzerland). People read 24-hour times from signs, schedules, and screens daily. But in conversation they almost always convert to 12-hour. A French person seeing 18:30 on a train ticket says "six heures trente" (six thirty), not "dix-huit heures trente." A German seeing 20:15 on a TV listing says "viertel nach acht" (quarter past eight). The 24-hour display is for clarity on paper; spoken language defaults to the familiar 12-hour rhythm.
Latin America (Brazil, Colombia, Argentina). The 24-hour clock is common in writing, but spoken Portuguese and Spanish convert to 12-hour. Brazilians seeing 17:00 say "cinco horas" (five o'clock), not "dezessete horas."
East Asia (Japan, South Korea). Japan uses both systems. Train schedules use 24-hour time; people say "gozen roku-ji" (6 AM) or "gogo roku-ji" (6 PM). The 24-hour number on the screen converts to 12-hour AM/PM in speech.
UK, Canada, Australia. These countries are officially on the 12-hour clock like the US, but 24-hour time appears on train and bus schedules. A Londoner seeing 18:30 on a departure board says "six thirty PM" or "half six." Never "eighteen thirty."
Military time vs 24-hour time
They use the same numbers but differ in format, pronunciation, and who uses them.
| Feature | Military time | 24-hour time |
|---|---|---|
| Format | No colon: 1830 | With colon: 18:30 |
| Spoken | Four-digit pronunciation + "hours" | Often converted to 12-hour in speech |
| Users | US/NATO armed forces, aviation, emergency services | Hospitals, transport, government, most non-US countries |
| Midnight | 0000 = "zero hundred hours" | 00:00 = "midnight" or "zero zero zero zero" in IT |
| Purpose | Eliminate ambiguity under stress | International standard, avoid AM/PM confusion |
The key difference: military time is designed so no two times sound alike over a radio. A pilot saying "eighteen thirty hours" cannot be misheard as "eight thirty." This is why the military insists on the four-digit pronunciation even though converting to 12-hour would feel more natural to most people.
Zero vs "oh" — and who uses which
"Zero" is the formal military standard. "Oh" is common in police, fire, and EMS dispatch. Both are correct, but they follow patterns by industry:
| Group | Style | Example (0600) |
|---|---|---|
| US Army / Marine Corps | "Zero" | "Zero six hundred hours" |
| US Navy / Coast Guard | "Zero" | "Zero six hundred" |
| Police / Fire / EMS | "Oh" | "Oh six hundred" or "six hundred" |
| Aviation (civilian) | "Zero" in UTC | "Zero six zero zero zulu" |
| Healthcare | Mixed, "oh" is common | "Oh six hundred" or just "six AM" |
For 0000 specifically: "zero hundred" is standard. "Zero dark hundred" is an informal military term for very early morning hours. It comes from "zero dark thirty" — the 2012 film about the bin Laden raid — and military slang uses it for the pitch-black hours before dawn.
0000 vs 2400 — same moment, different meaning
Both mean midnight, but they are used for different purposes.
0000
Marks the start of a day. If your shift begins at midnight, it starts at 0000. Used by most military, healthcare, and 24-hour schedules.
2400
Marks the end of a day. If a deadline is "by 2400 Friday," it means before Saturday starts. Some schedules prefer 2400 to avoid confusion about which day midnight belongs to.
In practice, most organizations stick to 0000 and never use 2400. If you see 2400 on a schedule, it refers to the same moment as 0000 the next day.
Common mistakes to avoid
- Using "hundred" for non-whole hours. 1730 is "seventeen thirty," not "seventeen hundred thirty." "Hundred" only applies when minutes are 00.
- Saying digits one at a time. 1830 is "eighteen thirty," not "one eight three zero." Each two-digit group is a number.
- Mixing military and civilian styles in formal settings. If you are in a military or aviation context, use the full four-digit pronunciation with "hours." Saying "six PM" when the radio protocol expects "eighteen hundred hours" is an error.
- Writing military time with a colon. Military time is 1830, not 18:30. 24-hour time is 18:30, not 1830. Mixing them signals that you do not know the convention.
- Saying "oh" when the protocol calls for "zero." In the Army and Marine Corps, use "zero." In police and fire, "oh" is the norm. Match your organization's standard.