| CITY | LOCAL TIME | Difference | Coming up |
|---|---|---|---|
| London United Kingdom | 01:00 | −8h | Becomes −9h on 25 Oct |
| Berlin Germany | 02:00 | −7h | Becomes −8h on 25 Oct |
| Dubai UAE | 04:00 | −5h | |
| Tokyo Japan | 09:00 | ±0h | |
| Sydney Australia | 10:00 | +1h | Becomes +2h on 4 Oct |
| New York United States | 20:00Wed | −13h | Becomes −14h on 1 Nov |
| Los Angeles United States | 17:00Wed | −16h | Becomes −17h on 1 Nov |
Jeju City, South Korea runs on UTC+9. This time zone stays fixed year-round at UTC+9 — daylight saving time is not observed. The time difference between Jeju City and New York is 13 hours. Standard working hours don't overlap at all with New York, so meetings need an early or late slot on one side. The time difference between Jeju City and London is 8 hours. Standard 9-to-6 working hours overlap for about 1 hour a day with London. A good time to connect: 17:00–18:00 in Jeju City lines up with 09:00–10:00 in London. Jeju City and Tokyo currently share the same clock. Standard 9-to-6 working hours overlap for about 9 hours a day with Tokyo. A good time to connect: 09:00–18:00 in Jeju City lines up with 09:00–18:00 in Tokyo. This timezone is also shared with cities such as Seoul, Pyongyang, Osaka. Keeping these offsets in mind makes it easier to schedule calls or travel to and from Jeju City.
Jeju City (South Korea) is home to roughly 490K people. Today brings about 11.9 hours of daylight: sunrise at 06:27, sunset at 18:20. This time zone stays fixed year-round at UTC+9 — daylight saving time is not observed. It sits in the Northern Hemisphere, about 34° north of the equator. Traffic drives on the right.
Flag
South Korea
Capital
Seoul
Continent
Asia
Time Zone
UTC+9 · Asia/Seoul
Coordinates
33.50°N, 126.53°E
Currency
KRW (₩)
Calling Code
+82
Driving Side
Right
Hemisphere
Northern
Language
Korean
Measurement System
Metric
Did You Know?
The haenyeo of Jeju free-dive for shellfish to depths of around 10 metres, holding their breath for up to two minutes, and many are now in their sixties and seventies. UNESCO listed the practice in 2016; the number of divers has fallen from around 26,000 in the 1960s to a few thousand.
The clock: Jeju keeps UTC+9. The Seoul–Jeju air route is consistently the busiest in the world by passenger numbers.
Jeju City lies at 126.5°E. Its time zone, UTC+9, is built around the 135°E meridian. The 8.5° gap between them means the clock runs roughly 34 minutes ahead of the sun: solar noon arrives at about 12:34 rather than 12:00. The zone holds UTC+9 all year — there is no daylight saving here.
The longest day of 2026 is 22 June, with 14h 23m of daylight. The shortest is 22 December, with 9h 56m. The swing between them is 4h 27m. At this latitude the seasons are visible in the clock, but never dramatic.
The earliest sunrise and the latest sunset do not land on the longest day. In Jeju City the sun comes up earliest on 13 June at 05:23, while the latest sunset waits until 1 July at 19:48. The equation of time is what separates them: the Earth's elliptical orbit and axial tilt move solar noon back and forth by several minutes over the year.
The sky stays usably light for a while after the sun goes down. In Jeju City that civil twilight runs about 25 minutes at the equinox.
Every figure in this section is computed from the city's own latitude, longitude and IANA time zone using NOAA solar algorithms (Spencer, 1971), accurate to about ±2 arcminutes below 65° latitude.
The official timezone for Jeju City, South Korea is Asia/Seoul with a current UTC offset of UTC+9.
Jeju City has an estimated population of 490K and is located at coordinates 33.50°N, 126.53°E.
Jeju City gets 14h 23m of daylight on its longest day and 9h 56m on its shortest, averaging 12h 11m a day across the year.
Solar noon in Jeju City falls at about 12:34 on UTC+9 standard time, because the city sits 8.5° from the meridian its zone is built on.
Women Who Dive Without Tanks: The haenyeo of Jeju free-dive for shellfish to depths of around 10 metres, holding their breath for up to two minutes, and many are now in their sixties and seventies.