0000 at a glance
- 12-hour time
- 12:00 AM (midnight)
- 24-hour clock
- 00:00
- Say it
- zero hundred hours (midnight)
- Part of day
- Midnight
- Minutes after midnight
- 0
- Minutes until midnight
- 1,440
- Decimal hours
- 0.00
- Share of the day gone
- 0%
How to convert 0000 to standard time
- The hour digits are 00, the first hour after midnight. On a 12-hour clock that hour is called 12, not 0.
- Keep the minutes (00) and add AM: 12:00 AM.
- Because there are no minutes, this is exactly midnight — the start of a new day.
How to say 0000
| Style | How it sounds |
|---|---|
| Military (spoken) | “zero hundred hours (midnight)” |
| Radio, digit by digit | “zero zero zero zero” |
| Civilian | “midnight” |
| Written 24-hour | 00:00 or 0000 |
On the hour, the minutes are spoken as “hundred”: 0000 is “zero hundred hours (midnight).” The leading zero is spoken too.
0000 Zulu (UTC) in US time zones
Military and aviation schedules give times in Zulu — Coordinated Universal Time — so that everyone works from one clock. When a message says 0000Z, this is the local time across the United States:
| Time zone | Standard time | Daylight time |
|---|---|---|
| Eastern (EST / EDT) | 7:00 PM (previous day) — R | 8:00 PM (previous day) — Q |
| Central (CST / CDT) | 6:00 PM (previous day) — S | 7:00 PM (previous day) — R |
| Mountain (MST / MDT) | 5:00 PM (previous day) — T | 6:00 PM (previous day) — S |
| Pacific (PST / PDT) | 4:00 PM (previous day) — U | 5:00 PM (previous day) — T |
| Alaska (AKST / AKDT) | 3:00 PM (previous day) — V | 4:00 PM (previous day) — U |
| Hawaii (HST) | 2:00 PM (previous day) — W | No daylight time |
The letter after each time is that zone’s military time-zone letter: Eastern standard time is R (Romeo, UTC−5), so 0000Z is 1900R. Daylight time runs from the second Sunday in March to the first Sunday in November; Hawaii and most of Arizona stay on standard time all year.
If 0000 is your local time
- 0000 Eastern is 0500Z in winter (EST) and 0400Z in summer (EDT).
- 0000 Central is 0600Z in winter (CST) and 0500Z in summer (CDT).
- 0000 Mountain is 0700Z in winter (MST) and 0600Z in summer (MDT).
- 0000 Pacific is 0800Z in winter (PST) and 0700Z in summer (PDT).
Times around 0000
| Change | Military | Standard |
|---|---|---|
| −60 min | 2300 | 11:00 PM (previous day) |
| −45 min | 2315 | 11:15 PM (previous day) |
| −30 min | 2330 | 11:30 PM (previous day) |
| −15 min | 2345 | 11:45 PM (previous day) |
| This time | 0000 | 12:00 AM |
| +15 min | 0015 | 12:15 AM |
| +30 min | 0030 | 12:30 AM |
| +45 min | 0045 | 12:45 AM |
| +60 min | 0100 | 1:00 AM |
Shifts that start at 0000
- An 8-hour shift starting at 0000 ends at 0800 (8:00 AM).
- A 10-hour shift starting at 0000 ends at 1000 (10:00 AM).
- A 12-hour shift starting at 0000 ends at 1200 (12:00 PM).
- To total the hours on a real time card with breaks, use the time card calculator.
0000 in everyday use
- A day on the 24-hour clock runs from 0000 to 2359. 0000 is the very first minute of the new day, so a deadline “at 0000 on the 15th” falls at the start of the 15th, not the end of it.
- Some schedules write the end of a day as 2400 (for example “open 0800–2400”). 2400 and 0000 are the same instant; to avoid confusion many planners use 2359 or 0001 instead.
Frequently asked questions
What is 0000 in regular time?
0000 is 12:00 AM, midnight in regular 12-hour time.
Is 0000 AM or PM?
0000 is 12:00 AM — midnight, the first minute of the day.
How do you say 0000 in military time?
Say “zero hundred hours (midnight).” In radio procedure each digit is spoken separately, so 0000 can also be read digit by digit.
What is 0000 Zulu in Eastern time?
0000Z is 7:00 PM (previous day) Eastern Standard Time (UTC−5) and 8:00 PM (previous day) Eastern Daylight Time (UTC−4).