0045 at a glance
- 12-hour time
- 12:45 AM
- 24-hour clock
- 00:45
- Say it
- zero zero forty-five hours
- Part of day
- Night (after midnight)
- Minutes after midnight
- 45
- Minutes until midnight
- 1,395
- Decimal hours
- 0.75
- Share of the day gone
- 3.13%
How to convert 0045 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 (45) and add AM: 12:45 AM.
- It is 45 minutes after midnight, so it belongs to the new day, not the previous evening.
How to say 0045
| Style | How it sounds |
|---|---|
| Military (spoken) | “zero zero forty-five hours” |
| Radio, digit by digit | “zero zero four five” |
| Civilian | “quarter to one in the morning” |
| Written 24-hour | 00:45 or 0045 |
Off the hour, say the hour pair and then the minutes: 00 → “zero zero”, 45 → “forty-five.” Adding “hours” at the end is standard in military speech but optional elsewhere.
0045 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 0045Z, this is the local time across the United States:
| Time zone | Standard time | Daylight time |
|---|---|---|
| Eastern (EST / EDT) | 7:45 PM (previous day) — R | 8:45 PM (previous day) — Q |
| Central (CST / CDT) | 6:45 PM (previous day) — S | 7:45 PM (previous day) — R |
| Mountain (MST / MDT) | 5:45 PM (previous day) — T | 6:45 PM (previous day) — S |
| Pacific (PST / PDT) | 4:45 PM (previous day) — U | 5:45 PM (previous day) — T |
| Alaska (AKST / AKDT) | 3:45 PM (previous day) — V | 4:45 PM (previous day) — U |
| Hawaii (HST) | 2:45 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 0045Z is 1945R. 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 0045 is your local time
- 0045 Eastern is 0545Z in winter (EST) and 0445Z in summer (EDT).
- 0045 Central is 0645Z in winter (CST) and 0545Z in summer (CDT).
- 0045 Mountain is 0745Z in winter (MST) and 0645Z in summer (MDT).
- 0045 Pacific is 0845Z in winter (PST) and 0745Z in summer (PDT).
Times around 0045
| Change | Military | Standard |
|---|---|---|
| −60 min | 2345 | 11:45 PM (previous day) |
| −45 min | 0000 | 12:00 AM |
| −30 min | 0015 | 12:15 AM |
| −15 min | 0030 | 12:30 AM |
| This time | 0045 | 12:45 AM |
| +15 min | 0100 | 1:00 AM |
| +30 min | 0115 | 1:15 AM |
| +45 min | 0130 | 1:30 AM |
| +60 min | 0145 | 1:45 AM |
Shifts that start at 0045
- An 8-hour shift starting at 0045 ends at 0845 (8:45 AM).
- A 10-hour shift starting at 0045 ends at 1045 (10:45 AM).
- A 12-hour shift starting at 0045 ends at 1245 (12:45 PM).
- To total the hours on a real time card with breaks, use the time card calculator.
0045 in everyday use
- 0045 falls in the overnight hours — the time of night shifts, red-eye flights and early deliveries. Writing it as 0045 instead of 12:45 AM removes any doubt about whether the morning or the evening is meant.
- A common slip is calling 0045 “12:45 PM.” It is 12:45 AM: the hour after midnight, not after noon.
Frequently asked questions
What is 0045 in regular time?
0045 is 12:45 AM in regular 12-hour time.
Is 0045 AM or PM?
0045 is AM. Military times from 0000 to 1159 are AM and times from 1200 to 2359 are PM.
How do you say 0045 in military time?
Say “zero zero forty-five hours.” In radio procedure each digit is spoken separately, so 0045 can also be read digit by digit.
What is 0045 Zulu in Eastern time?
0045Z is 7:45 PM (previous day) Eastern Standard Time (UTC−5) and 8:45 PM (previous day) Eastern Daylight Time (UTC−4).