When it is 09:00 in Bangkok it is 11:00 in Seoul in January and 11:00 in July. Seoul is 2 hours ahead Bangkok right now — and the difference is the same all year. This page gives the live times in both cities, the overlap between their working days, the daylight saving dates that move the difference, and the best meeting windows.
Try the tool: Time Zone Converter — convert any time between Bangkok and Seoul, with the offset for the date you pick.
Live times in Bangkok and Seoul
The two cities side by side. The January column uses the winter offsets (Bangkok UTC+07:00, Seoul UTC+09:00); the July column uses the summer offsets (Bangkok UTC+07:00, Seoul UTC+09:00).
| Time in Bangkok | Seoul in January | Seoul in July |
|---|---|---|
| 00:00 | 02:00 | 02:00 |
| 06:00 | 08:00 | 08:00 |
| 09:00 | 11:00 | 11:00 |
| 12:00 | 14:00 | 14:00 |
| 15:00 | 17:00 | 17:00 |
| 17:00 | 19:00 | 19:00 |
| 21:00 | 23:00 | 23:00 |
The world clock shows the current time in both cities live, and the individual city pages — time in Bangkok and time in Seoul — explain each city's time zone, offsets and daylight saving in full.
The time difference between Bangkok and Seoul
The difference is constant: Seoul is 2 hours ahead Bangkok on every day of the year. That is the simplest case in time-zone work — the answer does not depend on the date, and a meeting set for 09:00 in Bangkok is always 11:00 in Seoul. The reason the difference never changes is that neither city observes daylight saving.
To convert a time, add the difference: 09:00 in Bangkok is 11:00 in Seoul in January and 11:00 in July; 17:00 in Bangkok — the end of the working day — is 19:00 in Seoul in January and 19:00 in July. To go the other way, subtract it: 09:00 in Seoul is 07:00 in Bangkok in January. The time difference calculator does the arithmetic for any date, and the UTC to Seoul page gives the full conversion table for Seoul.
Meeting overlap between Bangkok and Seoul
The overlap is the hours when both cities are in their working day (09:00–17:00 local time). The table marks the overlapping hours in Bangkok's working day and shows what time they are in Seoul.
January
| Bangkok time | Seoul time | Both working? |
|---|---|---|
| 09:00 | 11:00 | Yes |
| 10:00 | 12:00 | Yes |
| 11:00 | 13:00 | Yes |
| 12:00 | 14:00 | Yes |
| 13:00 | 15:00 | Yes |
| 14:00 | 16:00 | Yes |
| 15:00 | 17:00 | Yes |
| 16:00 | 18:00 | Yes |
In January the overlap is 8 hours: 09:00, 10:00, 11:00, 12:00, 13:00, 14:00, 15:00, 16:00 Bangkok time. In July it is 8 hours: 09:00, 10:00, 11:00, 12:00, 13:00, 14:00, 15:00, 16:00 Bangkok time. The meeting planner finds the overlap for any two cities and any date, and the meeting time finder finds it for a whole team.
Daylight saving in Bangkok and Seoul
Bangkok does not observe daylight saving, so its offset of UTC+07:00 never changes.
Seoul does not observe daylight saving, so its offset of UTC+09:00 never changes.
The difference never changes, so there is no date on which a standing meeting moves. That does not mean the difference is the same as the difference with a third city — the difference between Bangkok and London, for example, may still move when London changes its clocks. The individual DST pages — Bangkok DST 2026 and Seoul DST 2026 — give the exact dates for each city.
Best meeting windows
The best windows in January are 09:00–17:00 in Bangkok (11:00–19:00 in Seoul). These are the hours inside both working days, so nobody is up early or late. It is a short window, so keep the meeting short and send an agenda in advance.
Calling and travel notes
When it is 09:00 in Bangkok it is 11:00 in Seoul in January; when it is 12:00 in Bangkok it is 14:00 in Seoul; when it is 17:00 in Bangkok it is 19:00 in Seoul. The difference is under 12 hours, so the two cities are usually on the same date — but check the date for late-evening and early-morning times, when the date can differ by a day. Scheduling inside Asia is usually straightforward: most Asian countries do not observe daylight saving, so the difference between Bangkok and Seoul never changes. The working days overlap for most of the day, and the only thing to check is the date: when the difference is large enough, the two cities can be on different dates for part of the day.
Worked conversions
Six conversions, for January (offsets Bangkok UTC+07:00, Seoul UTC+09:00):
| Bangkok | Seoul |
|---|---|
| 08:00 | 10:00 |
| 09:00 | 11:00 |
| 12:00 | 14:00 |
| 14:00 | 16:00 |
| 17:00 | 19:00 |
| 20:00 | 22:00 |
In July, the answers are the same. For the reverse direction, see Seoul to Bangkok time.
Bangkok and Seoul at a glance
| Fact | Bangkok | Seoul |
|---|---|---|
| Country | Thailand | South Korea |
| Region | Asia | Asia |
| IANA time zone | Asia/Bangkok |
Asia/Seoul |
| Standard offset | UTC+07:00 | UTC+09:00 |
| Daylight saving offset | — does not observe | — does not observe |
| Offset in January 2026 | UTC+07:00 | UTC+09:00 |
| Offset in July 2026 | UTC+07:00 | UTC+09:00 |
| Observes daylight saving | No | No |
The table is the whole pair in one place. The two numbers that matter most are the January and July offsets: if they are the same in both columns for a city, that city's offset never changes; if they differ, the city observes daylight saving and the difference between the cities moves with it. The individual city pages — time in Bangkok and time in Seoul — explain each city's time zone, and the DST pages — Bangkok DST 2026 and Seoul DST 2026 — give the exact change dates.
Frequently asked questions
What is the time difference between Bangkok and Seoul?
Seoul is 2 hours ahead Bangkok right now. In January the difference is 2 hours ahead and in July it is 2 hours ahead — it is the same all year.
How do I schedule a recurring meeting between Bangkok and Seoul?
Pick a time inside the overlap — 09:00–17:00 Bangkok time — and set the calendar event in UTC so it moves correctly when the clocks change. Re-check the overlap in March and October, when the difference moves, and rotate the time if the meeting falls outside someone's working day.
What time is it in Seoul when it is 09:00 in Bangkok?
It is 11:00 in January and 11:00 in July. The time zone converter gives the answer for any date.
What is the best time for a meeting between Bangkok and Seoul?
The best windows in January are 09:00–17:00 Bangkok time — inside both working days.
Does the time difference between Bangkok and Seoul change during the year?
No. The difference is 2 hours ahead all year, because neither city observes daylight saving.
What time is it in Bangkok when it is 09:00 in Seoul?
It is 07:00 in January and 07:00 in July. See Seoul to Bangkok time for the full comparison from Seoul's side.
What are the time zones of Bangkok and Seoul?
Bangkok is in Asia/Bangkok (UTC+07:00 standard time) and Seoul is in Asia/Seoul (UTC+09:00 standard time).
What time is it in Bangkok when it is midnight in Seoul?
It is 22:00 in Bangkok in January and 22:00 in July — the same day, because Bangkok is ahead of Seoul. Midnight conversions are the ones that most often land on the wrong date, so always check the date as well as the time.
Sources
- IANA Time Zone Database, via Node.js Intl (
Intl.DateTimeFormatwithtimeZone) — offsets, daylight saving dates and local times in this article were worked out from the IANA database, not typed from memory. - TimeFlow's own time-zone data (
data/cities.ts,data/dst.ts), computed from the IANA database. - TimeFlow's time zone converter and meeting planner — the live tools behind the numbers on this page.
- Time-zone and daylight saving rules are set by governments and can change. For flights, deadlines and meetings that cannot move, confirm the time with an official source.