What is 0400 Military Time?
0400 is
4:00 AM
AMSpoken as: Zero Four Hundred Hours
How to Read 0400 Military Time
- 1
Take the first two digits: 04 is the hour.
- 2
4 is less than 12 — this is morning. Keep the hour as 4.
- 3
The period is AM (morning).
- 4
Last two digits are minutes: 00.
Therefore 0400 = 4:00 AM.
What Is Military Time?
Military time is a 24-hour clock system used by the US military, hospitals, emergency services, and aviation. It runs from 0000 (midnight) to 2359 (11:59 PM), eliminating AM/PM ambiguity.
When is 0400 used?
0400 falls in the pre-dawn window — a period of peak operational sensitivity in military contexts. Night shifts, overnight watches, and early morning stand-to operations occur between 0100 and 0500. In hospitals, these are the hours for overnight nursing rounds. Emergency dispatchers log the highest fatigue-related risk during this range.
Military Time Conversion Chart
| Military | Standard | Spoken |
|---|---|---|
| 0000 | 12:00 AM | Zero Hundred Hours |
| 0100 | 1:00 AM | Zero One Hundred Hours |
| 0200 | 2:00 AM | Zero Two Hundred Hours |
| 0300 | 3:00 AM | Zero Three Hundred Hours |
| 0400 | 4:00 AM | Zero Four Hundred Hours |
| 0500 | 5:00 AM | Zero Five Hundred Hours |
| 0600 | 6:00 AM | Zero Six Hundred Hours |
| 0700 | 7:00 AM | Zero Seven Hundred Hours |
| 0800 | 8:00 AM | Zero Eight Hundred Hours |
| 0900 | 9:00 AM | Zero Nine Hundred Hours |
| 1000 | 10:00 AM | Ten Hundred Hours |
| 1100 | 11:00 AM | Eleven Hundred Hours |
| 1200 | 12:00 PM | Twelve Hundred Hours |
| 1300 | 1:00 PM | Thirteen Hundred Hours |
| 1400 | 2:00 PM | Fourteen Hundred Hours |
| 1500 | 3:00 PM | Fifteen Hundred Hours |
| 1600 | 4:00 PM | Sixteen Hundred Hours |
| 1700 | 5:00 PM | Seventeen Hundred Hours |
| 1800 | 6:00 PM | Eighteen Hundred Hours |
| 1900 | 7:00 PM | Nineteen Hundred Hours |
| 2000 | 8:00 PM | Twenty Hundred Hours |
| 2100 | 9:00 PM | Twenty One Hundred Hours |
| 2200 | 10:00 PM | Twenty Two Hundred Hours |
| 2300 | 11:00 PM | Twenty Three Hundred Hours |
Frequently Asked Questions
- What is 0400 military time?
- 0400 military time is 4:00 AM in standard 12-hour time.
- How do you say 0400 in military time?
- 0400 is spoken as "Zero Four Hundred Hours" in military time.
- Is 0400 military time AM or PM?
- 0400 military time is AM. Hours 0000–1159 in military time are AM.
- What time is 0400 hours?
- 0400 hours is 4:00 AM. Military time values below 1200 are morning (AM).
- How do you convert 0400 military time to regular time?
- 0400 is below 1200, so just read the hour directly: 04 = 4 AM.