What Is 0400 in Regular Time?
Quick answer: 0400 military time is 4:00 AM in regular time.
0400 military time = 4:00 AM in standard time.
Military: 0400
Regular time: 4:00 AM
Military time uses a 24-hour clock, which removes the need for AM and PM.
If you see 0400 on a schedule, it means four o’clock in the morning. Still dark outside, but the early risers are already moving.
What Does 0400 Mean in Military Time?
0400 in military time means 4:00 AM in standard 12-hour time. Military time runs on a 24-hour clock from 0000 to 2359, so 0400 represents four hours after midnight.
How to Convert 0400 to Regular Time
Morning military times don’t need much conversion. Just read the hour and add AM.
04 = 4:00 AM
The leading zero is only there to keep military time in a four-digit format. The actual time is simply 4 AM.
Military Time Conversion Rule
Military time follows a simple formula.
0000–1159 → Morning hours (AM)
Just read the hour and add AM.
Examples:
0300 = 3:00 AM
0500 = 5:00 AM
1000 = 10:00 AM
1300–2359 → Afternoon and evening hours (PM)
Subtract 12 from the hour.
Examples:
1500 = 3:00 PM
1800 = 6:00 PM
2000 = 8:00 PM
Since 0400 falls in the morning range, no subtraction is needed.
What About Minutes?
Minutes stay the same in both systems.
0430 is 4:30 AM
0415 is 4:15 AM
0445 is 4:45 AM
Only the hour sometimes changes. The minutes remain identical.
How to Say 0400 Out Loud
The standard way is:
“zero four hundred.”
More formally:
“zero four hundred hours.”
With minutes:
0430 is “zero four thirty.”
0405 is “zero four oh five.”
When Would You Actually See 0400?
0400 is when the early morning world starts moving. People who are awake at this hour are usually doing something serious.
Military wake-up. In basic training, 0400 is a common wake-up time. Drill instructors flip on the lights and the day begins whether you’re ready or not.
Fishing charters and outdoor guides. Charter boats and hunting guides often meet clients at 0400 so they can get on the water or into the field before sunrise.
News anchors and producers. Morning television teams often arrive at 0400 or earlier to prepare for broadcasts that start between 0500 and 0700.
Hospital shift handoff. Some hospitals run shift changes at 0400, especially in intensive care units where patient monitoring never stops.
Quick Reference: Times Around 0400
| Military Time | Regular Time |
|---|---|
| 0300 | 3:00 AM |
| 0400 | 4:00 AM |
| 0500 | 5:00 AM |
Related posts:
Going the Other Way: 4:00 AM to Military Time
4:00 AM becomes 0400. Just add a zero in front and remove the AM.
Examples:
4:30 AM → 0430
4:15 AM → 0415
All single-digit morning hours follow this same pattern.
Frequently Asked Questions
Is 0400 AM or PM?
0400 is AM. It equals 4:00 AM in standard time.
How do you say 0400 in military time?
Say it as “zero four hundred” or “zero four hundred hours.”
How do you convert 4:00 AM to military time?
Add a leading zero and drop the AM. 4:00 AM becomes 0400.
Need to convert a different time? Check out the full military time chart or use our instant converter to look up any time in seconds.
