Jeju City runs on UTC+9 (KST) every day of the year, with no daylight saving time.
Jeju City and your time
Jeju City at a glance
| Country | South Korea |
|---|---|
| Region | Jeju-do |
| Time zone | Asia/Seoul |
| Abbreviation now | KST |
| UTC offset now | UTC+9 |
| Daylight saving time | Not observed since 1988 |
| Coordinates | 33.51° N, 126.52° E |
Which time zone Jeju City uses
The clocks in Jeju City follow Asia/Seoul and do not move with the seasons. The last daylight saving period here was in 1988. Since then the offset has stayed at UTC+9.
Jeju City is on the same time as the rest of South Korea, including the capital, Seoul.
Clock changes in Jeju City, 2026 and 2027
No clock changes are scheduled in Jeju City for 2026 or 2027.
Time difference between Jeju City and other cities
A 9:00 AM start in Jeju City is 7:00 PM (previous day) in New York, 11:00 AM in Sydney and 4:00 PM (previous day) in Los Angeles.
| City | Time now | Difference now | In January | In July | Shared office hours |
|---|---|---|---|---|---|
| New York (United States) | --:-- | 14 h behind | 14 h behind | 13 h behind | None |
| Los Angeles (United States) | --:-- | 17 h behind | 17 h behind | 16 h behind | None |
| London (United Kingdom) | --:-- | 9 h behind | 9 h behind | 8 h behind | None |
| Paris (France) | --:-- | 8 h behind | 8 h behind | 7 h behind | None |
| Dubai (United Arab Emirates) | --:-- | 5 h behind | 5 h behind | 5 h behind | 3 h |
| Mumbai (India) | --:-- | 3 h 30 min behind | 3 h 30 min behind | 3 h 30 min behind | 4 h 30 min |
| Singapore | --:-- | 1 h behind | 1 h behind | 1 h behind | 7 h |
| Tokyo (Japan) | --:-- | Same time | Same time | Same time | 8 h |
| Sydney (Australia) | --:-- | 2 h ahead | 2 h ahead | 1 h ahead | 6 h |
| UTC | --:-- | 9 h behind | 9 h behind | 9 h behind | None |
Because Jeju City keeps one offset all year, any change in the gap comes from the other city’s daylight saving time. Compare the January and July columns.
Shared office hours counts the time when the clock reads between 9 AM and 5 PM in both cities on the same day.
Daylight in Jeju City
Today
| Sunrise | --:-- |
|---|---|
| Sunset | --:-- |
| Day length | -- |
| Solar noon | --:-- |
Over the year, daylight in Jeju City grows from 9 hours 56 minutes to 14 hours 23 minutes and back, a swing of 4 hours 27 minutes.
Daylight through the year in Jeju City
| Date | Sunrise | Sunset | Day length | |
|---|---|---|---|---|
| March equinox | March 20 | 6:38 AM | 6:45 PM | 12 h 7 min |
| June solstice | June 21 | 5:24 AM | 7:47 PM | 14 h 23 min |
| September equinox | September 23 | 6:22 AM | 6:30 PM | 12 h 8 min |
| December solstice | December 22 | 7:34 AM | 5:30 PM | 9 h 56 min |
Clock time and sun time in Jeju City
Jeju City lies close to the centre of its time zone, so the sun is highest at about 12:35 PM on standard time, close to clock noon.
Places close to Jeju City
All the places listed below keep the same time as Jeju City.
| City | Distance | Time now | Difference |
|---|---|---|---|
| Seogwipo | 29 km (18 mi) | --:-- | Same time |
| Mokpo | 145 km (90 mi) | --:-- | Same time |
| Yeosu | 174 km (108 mi) | --:-- | Same time |
| Suncheon | 183 km (114 mi) | --:-- | Same time |
| Gwangju | 186 km (116 mi) | --:-- | Same time |
| Kwangyang | 192 km (120 mi) | --:-- | Same time |
| Jeongeup | 235 km (146 mi) | --:-- | Same time |
| Jinju | 236 km (147 mi) | --:-- | Same time |
More cities in South Korea
All time zones and cities in South Korea
Tools for time in Jeju City
- Convert a time to or from Jeju City: pick a date and time and see it in every city on your list.
- Add Jeju City to your world clock to keep it next to your own time.
- Find a meeting time that falls inside office hours in Jeju City and the other cities you work with.
- Open a full-screen clock for your own time zone.
Frequently asked questions
What time zone is Jeju City in?
Jeju City uses the Asia/Seoul time zone, which is UTC+9 (KST) all year.
Does Jeju City use daylight saving time?
Not any more. Jeju City last changed its clocks for daylight saving time in 1988 and now stays on UTC+9 all year.
What is the time difference between Jeju City and New York?
Jeju City is 14 hours ahead of New York in January and 13 hours ahead of New York in July, because New York moves its clocks for daylight saving time and Jeju City does not.
Is Jeju City on the same time as Seoul?
Yes. Jeju City and Seoul both use UTC+9 right now.
How long is the longest day in Jeju City?
About 14 hours 23 minutes, around the June solstice. The shortest day, around the December solstice, has about 9 hours 56 minutes of daylight.
Time zone rules: IANA tz database, version 2026e. Place names and coordinates: GeoNames. Sunrise and sunset are calculated from the coordinates and can differ by a minute or two from local almanacs.