0400 military time is 4:00 AM
0400 in military time is 4:00 AM, at night. It is said “zero four hundred”.
- Say it
- “zero four hundred”, informally “oh four hundred” (common usage; no manual spells out 0000 to 0059)
- 24-hour clock
- 04:00
How to convert 0400 to standard time
- The hour is 04, which is less than 12, so the time is AM (before noon).
- Drop the leading zero (04 becomes 4), keep the minutes (00) and add AM: 4:00 AM.
And the other way: 4:00 AM in military time is 0400: write the hour with two digits (a leading zero) and leave out the colon and AM.
How to say 0400
Say “zero four hundred”. You may also hear “oh four hundred”; the manuals say “zero”. Spoken, “hours” often follows: “zero four hundred hours”. In writing, the Army and Air Force leave “hours” out. How military time is said and written.
- Military time
- 0400
- Standard time
- 4:00 AM
- 24-hour clock
- 04:00
- Part of the day
- Night
0400 with a time zone
On its own, 0400 is a local time: 0400 in New York is 4:00 AM in New York. Written with a Z, as 0400Z, it is Zulu time (UTC), which in US time zones is:
| 0400Z in | Daylight time (March to November) | Standard time (November to March) |
|---|---|---|
| EasternNew York | 0000 12:00 AMUTC−4 · Q | 2300 11:00 PM, the day beforeUTC−5 · R |
| CentralChicago | 2300 11:00 PM, the day beforeUTC−5 · R | 2200 10:00 PM, the day beforeUTC−6 · S |
| MountainDenver | 2200 10:00 PM, the day beforeUTC−6 · S | 2100 9:00 PM, the day beforeUTC−7 · T |
| PacificLos Angeles | 2100 9:00 PM, the day beforeUTC−7 · T | 2000 8:00 PM, the day beforeUTC−8 · U |
“The day before” and “the next day” count from the Zulu date. US daylight time runs from the second Sunday in March to the first Sunday in November (NIST). Any Zulu time: Zulu time now.
Times around 0400
Every quarter of this hour: 0400 · 0415 · 0430 · 0445
Questions people ask
What is 0400 in military time?
0400 in military time is 4:00 AM, at night.
How do you say 0400 in military time?
Say “zero four hundred”. You may also hear “oh four hundred”; the manuals say “zero”. Spoken, “hours” often follows: “zero four hundred hours”. In writing, the Army and Air Force leave “hours” out.
What is 4:00 AM in military time?
4:00 AM in military time is 0400: write the hour with two digits (a leading zero) and leave out the colon and AM.
What is 0400Z in Eastern time?
0400Z (Zulu, which is UTC) is 0000 (12:00 AM) in Eastern Daylight Time and 2300 (11:00 PM) the day before in Eastern Standard Time.
All the hours and minutes of the day are in the military time chart.