0645 at a glance
- 12-hour time
- 6:45 AM
- 24-hour clock
- 06:45
- Say it
- zero six forty-five hours
- Part of day
- Early morning
- Minutes after midnight
- 405
- Minutes until midnight
- 1,035
- Decimal hours
- 6.75
- Share of the day gone
- 28.13%
How to convert 0645 to standard time
- The hour digits are 06. Hours 01 to 11 are the same on both clocks — just drop the leading zero: 6.
- Put a colon before the minutes and add AM: 6:45 AM.
How to say 0645
| Style | How it sounds |
|---|---|
| Military (spoken) | “zero six forty-five hours” |
| Radio, digit by digit | “zero six four five” |
| Civilian | “quarter to seven in the morning” |
| Written 24-hour | 06:45 or 0645 |
Off the hour, say the hour pair and then the minutes: 06 → “zero six”, 45 → “forty-five.” Adding “hours” at the end is standard in military speech but optional elsewhere.
0645 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 0645Z, this is the local time across the United States:
| Time zone | Standard time | Daylight time |
|---|---|---|
| Eastern (EST / EDT) | 1:45 AM — R | 2:45 AM — Q |
| Central (CST / CDT) | 12:45 AM — S | 1:45 AM — R |
| Mountain (MST / MDT) | 11:45 PM (previous day) — T | 12:45 AM — S |
| Pacific (PST / PDT) | 10:45 PM (previous day) — U | 11:45 PM (previous day) — T |
| Alaska (AKST / AKDT) | 9:45 PM (previous day) — V | 10:45 PM (previous day) — U |
| Hawaii (HST) | 8:45 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 0645Z is 0145R. 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 0645 is your local time
- 0645 Eastern is 1145Z in winter (EST) and 1045Z in summer (EDT).
- 0645 Central is 1245Z in winter (CST) and 1145Z in summer (CDT).
- 0645 Mountain is 1345Z in winter (MST) and 1245Z in summer (MDT).
- 0645 Pacific is 1445Z in winter (PST) and 1345Z in summer (PDT).
Times around 0645
| Change | Military | Standard |
|---|---|---|
| −60 min | 0545 | 5:45 AM |
| −45 min | 0600 | 6:00 AM |
| −30 min | 0615 | 6:15 AM |
| −15 min | 0630 | 6:30 AM |
| This time | 0645 | 6:45 AM |
| +15 min | 0700 | 7:00 AM |
| +30 min | 0715 | 7:15 AM |
| +45 min | 0730 | 7:30 AM |
| +60 min | 0745 | 7:45 AM |
Shifts that start at 0645
- An 8-hour shift starting at 0645 ends at 1445 (2:45 PM).
- A 10-hour shift starting at 0645 ends at 1645 (4:45 PM).
- A 12-hour shift starting at 0645 ends at 1845 (6:45 PM).
- To total the hours on a real time card with breaks, use the time card calculator.
0645 in everyday use
- 0645 is early-shift territory. Many 12-hour shifts in hospitals and plants change over at 0700 and 1900, and 8-hour shifts often start at 0600 or 0700, so times like 0645 are common on rosters and badge records.
- Because the hour is below 10, the military form keeps a leading zero: 0645, never 645.
Frequently asked questions
What is 0645 in regular time?
0645 is 6:45 AM in regular 12-hour time.
Is 0645 AM or PM?
0645 is AM. Military times from 0000 to 1159 are AM and times from 1200 to 2359 are PM.
How do you say 0645 in military time?
Say “zero six forty-five hours.” In radio procedure each digit is spoken separately, so 0645 can also be read digit by digit.
What is 0645 Zulu in Eastern time?
0645Z is 1:45 AM Eastern Standard Time (UTC−5) and 2:45 AM Eastern Daylight Time (UTC−4).