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Jeju-do, South Korea

Jeju-do uses Korea Standard Time, UTC+9, all year. Neither Jeju Island nor the province’s smaller islands observe daylight saving time, so the official offset never changes seasonally.

Jeju City, South Korea

Friday, 4 September 2026

UTC+9 · Asia/Seoul

Time and sun data for Jeju City — the largest city of Jeju-do

The sun in Jeju City

Sunrise 06:11 Solar noon 12:35 Sunset 18:58 Daylight 12 h 47 min Night 11 h 13 min Civil twilight 05:46 – 19:24

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Current time in Jeju-do, South Korea

Jeju-do’s local clock is nine hours ahead of UTC. Add nine hours when converting from UTC and check whether the calculation enters the next calendar day. Every settlement in the province follows this rule.

Although Jeju lies south of much of the Korean mainland, it does not have a separate island time zone. Flights, ferries, accommodation bookings, and local opening hours use the same national standard as Seoul and Busan.

Island time may feel slower on holiday, but Jeju’s clocks remain precisely as hurried as the mainland’s.

Jeju City, Seogwipo, and the island clock

The province is organized around two cities. Jeju City occupies the northern side of the main island and serves as the provincial capital. Seogwipo covers the southern side and also administers offshore islands.

Jeju City uses UTC+9. Seogwipo uses UTC+9. Udo and other inhabited islands use UTC+9. Ferry and flight schedules are normally stated in local Korean time. Travelling around Jeju-do therefore requires no time conversion. The practical differences between the north and south are weather, terrain, journey duration, and daylight visibility—not the setting on a watch.

Planning around sunrise in Jeju-do

Sunrise varies by season, date, and observation point. The eastern side of Jeju Island is often chosen for an open view toward dawn, while Mount Hallasan and surrounding terrain can obstruct or delay visible sunlight from other positions.

A calculated sunrise refers to the Sun’s relationship with an ideal horizon. It cannot promise a clear view. Cloud, ridges, buildings, and the observer’s elevation affect what a person sees, while the official clock remains unchanged.

Pick the exact beach, peak, town, or island. Look up sunrise for the intended local date. Check travel time before dawn, especially for remote viewpoints. Review weather and access conditions separately from the astronomical time.

Day length increases and decreases through the year. This natural cycle does not imply daylight saving time. If an overseas phone or calendar shifts a Jeju appointment by an hour, the likely cause is the other location’s rules or the device’s settings.

Questions and answers

Is Jeju-do in a different time zone from mainland South Korea?
No. Jeju-do and the mainland both follow Korea Standard Time, UTC+9.
Do clocks change in summer on Jeju Island?
No. The province does not observe daylight saving time.
Where should I check sunrise for Jeju-do?
Use the nearest precise location, such as Jeju City, Seogwipo, or the chosen viewpoint, together with the correct date.
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