1230 military time
1230 = 12:30 PM
1230 is half past 12 in the afternoon. With a colon it is 12:30.
Convert another time
How to read 1230
1230 is in the noon hour, 1200 to 1259, which takes PM without subtracting anything: 1230 is 12:30 PM, 30 minutes after noon.
Hour 12 stays 12, and it is PM. This is the one afternoon hour you do not subtract from.
Half past noon is still PM, and you subtract nothing. The value it gets confused with is 0030, half past midnight.
1230 falls in the afternoon: 12 hours and 30 minutes after midnight, 52.1% of the way through the day, with 11 hours and 30 minutes left until the next midnight.
How to say it
Pilots and air traffic controllers say each digit: “one two three zero”. Off the radio, people usually read 1230 as two numbers.
Counting hours to and from 1230
Start and end times on a timesheet come down to this subtraction. The decimal column is the form many payroll systems want; the minutes to decimal chart covers every minute.
| Start | Length | Decimal |
|---|---|---|
| 0600 | 6 h 30 min | 6.50 |
| 0700 | 5 h 30 min | 5.50 |
| 0800 | 4 h 30 min | 4.50 |
| 0900 | 3 h 30 min | 3.50 |
| Add | Military | 12-hour |
|---|---|---|
| 1 h | 1330 | 1:30 PM |
| 2 h | 1430 | 2:30 PM |
| 4 h | 1630 | 4:30 PM |
| 8 h | 2030 | 8:30 PM |
| 10 h | 2230 | 10:30 PM |
| 12 h | 0030 | 12:30 AM (next day) |
1230Z: the same moment in other time zones
Written 1230Z, the time is in UTC, and the local clock depends on the zone and the season.
| Zone | Standard time | Summer time |
|---|---|---|
| US Eastern (New York) | 7:30 AM UTC−5 | 8:30 AM UTC−4 |
| US Central (Chicago) | 6:30 AM UTC−6 | 7:30 AM UTC−5 |
| US Mountain (Denver) | 5:30 AM UTC−7 | 6:30 AM UTC−6 |
| US Pacific (Los Angeles) | 4:30 AM UTC−8 | 5:30 AM UTC−7 |
| Alaska (Anchorage) | 3:30 AM UTC−9 | 4:30 AM UTC−8 |
| Hawaii (Honolulu) | 2:30 AM UTC−10 | no change |
| UK (London) | 12:30 PM UTC+0 | 1:30 PM UTC+1 |
| Central Europe (Berlin) | 1:30 PM UTC+1 | 2:30 PM UTC+2 |
| India | 6:00 PM UTC+5:30 | no change |
| Japan and South Korea | 9:30 PM UTC+9 | no change |
| Australia East (Sydney) | 10:30 PM UTC+10 | 11:30 PM UTC+11 |
For a particular date and city, use the time zone converter, which applies the exact daylight saving dates.
Nearby military times
The full chart is on the military time page.