Seoul to Hong Kong time
Seoul runs exactly one hour ahead of Hong Kong (HKT), and since neither city observes daylight saving time, that one-hour gap stays the same in January, August, or any month in between.
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Seoul UTC+9 vs. Hong Kong UTC+8 — why it's always one hour
Seoul sits at UTC+9 and Hong Kong at UTC+8 (HKT), a clean one-hour standard-time difference. Cities that run daylight saving time — London, or Sydney — see their gap swing by an hour with the seasons (Sydney is even trickier, since its southern-hemisphere DST runs October–April, the reverse of the northern summer). Korea and Hong Kong use no DST at all, so none of that applies: Seoul is one hour ahead of Hong Kong every single day of the year, with no exceptions to memorize.
Worked examples: Seoul time to Hong Kong time
The rule is simple — subtract one hour from Seoul to get Hong Kong. 9:00 AM in Seoul is 8:00 AM in Hong Kong; 6:00 PM (18:00) in Seoul is 5:00 PM (17:00) in Hong Kong. Going the other way, if a Hong Kong colleague proposes a 2:00 PM (14:00 HKT) call, that lands at 3:00 PM (15:00) for you in Seoul. The gap is small enough that you'll almost never cross midnight, so there's no date rollover to trip over.
When you'll reach for this: calls, flights, live streams, family
With only one hour between them, Seoul and Hong Kong working days overlap almost entirely — handy for scheduling with Hong Kong's finance and trading desks, where a 9:00 AM Seoul meeting is simply 8:00 AM there. The flight from Incheon or Gimpo to Hong Kong (HKG) runs about 3 hours 40 minutes to 4 hours, so this helps you work out your local arrival time too. It's just as useful for catching a live sports broadcast or stream out of Hong Kong, or for timing a call to family or a support line there — drop the date and time into the converter above and you'll have the answer instantly.
Frequently asked questions
How many hours is the time difference between Seoul and Hong Kong?
Seoul (UTC+9) is exactly one hour ahead of Hong Kong (UTC+8, HKT). When it's 10:00 AM in Seoul, it's 9:00 AM in Hong Kong. Neither city observes daylight saving time, so this one-hour gap is fixed year-round.
Is there a time of year when the difference changes because of daylight saving?
No. Korea and Hong Kong don't observe daylight saving time, so the gap stays at one hour through spring, summer, autumn, and winter alike. For pairs that do use DST — Sydney, for instance, whose southern-hemisphere DST runs October–April, opposite the northern summer — the offset shifts by season, and this converter applies the correct DST automatically for the date you pick. For Seoul and Hong Kong, though, any date gives the same one-hour result.
What time is 9:00 AM Seoul in Hong Kong?
It's 8:00 AM in Hong Kong — just subtract one hour from the Seoul time. For example, a 9:00 PM (21:00) match broadcast in Seoul is 8:00 PM (20:00) in Hong Kong. Enter any date and time in the converter above and it will handle the reverse direction (Hong Kong → Seoul) just as quickly.