What is the time difference between Seoul and Hong Kong?

Hong Kong is 1 hour behind Seoul. That figure is current — it changes by an hour when either city starts or ends daylight saving, and the exact dates are listed above.

When is the best time to call Hong Kong from Seoul?

Between 10:00–18:00 in Seoul, which is 09:00–17:00 in Hong Kong. That is the only stretch where both cities are inside a 09:00–18:00 day.

Does Seoul observe daylight saving time?

No. Seoul stays on UTC+9 all year, so its clocks never move.

Does Hong Kong observe daylight saving time?

No. Hong Kong stays on UTC+8 all year, so its clocks never move.

If it is midday in Seoul, what time is it in Hong Kong?

It is 11:00 in Hong Kong, on the same calendar date. That holds for the current offsets; it does not change through the year, because neither city moves its clocks.

Which time zones do Seoul and Hong Kong use?

Seoul uses Asia/Seoul, currently UTC+9, and Hong Kong uses Asia/Hong_Kong, currently UTC+8. Those identifiers are the ones to use in code — abbreviations are ambiguous and offsets change.

Convert Seoul time to Hong Kong time

Right now Hong Kong runs 1 hour behind Seoul. That gap is not fixed: it moves when either city changes its clocks.

Convert a time

From

Date

Time

Converted time

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The converter needs JavaScript to run. Everything below — offsets, daylight saving dates and the hour-by-hour table — is part of the page and works without it.

Hour by hour

Every hour of a day in Seoul, and what the clock reads in Hong Kong at that same moment.

Seoul	Hong Kong
00:00	23:00previous day
01:00	00:00
02:00	01:00
03:00	02:00
04:00	03:00
05:00	04:00
06:00	05:00
07:00	06:00
08:00	07:00
09:00	08:00
10:00	09:00
11:00	10:00
12:00	11:00
13:00	12:00
14:00	13:00
15:00	14:00
16:00	15:00
17:00	16:00
18:00	17:00
19:00	18:00
20:00	19:00
21:00	20:00
22:00	21:00
23:00	22:00

Daylight saving time

Neither Seoul nor Hong Kong changes its clocks, so the difference between them is the same every day of the year.

Seoul

Does not observe daylight saving time

Standard: UTC+9

Hong Kong

Does not observe daylight saving time

Standard: UTC+8

When you can actually talk

The window is 8 hours wide — 10:00–18:00 in Seoul, 09:00–17:00 in Hong Kong.

Seoul 10:00–18:00Hong Kong 09:00–17:00

Reference

The underlying data, in case you need to put it in a calendar invitation or a configuration file.

	Seoul	Hong Kong
IANA zone	Asia/Seoul	Asia/Hong_Kong
Abbreviation	UTC+9	UTC+8
Standard offset	UTC+9	UTC+8
Daylight offset	—	—
Clock changes this year	0	0
Country	South Korea	Hong Kong SAR China

Example, not the current time. Live times appear once the page loads.

Common questions

What is the time difference between Seoul and Hong Kong?: Hong Kong is 1 hour behind Seoul. That figure is current — it changes by an hour when either city starts or ends daylight saving, and the exact dates are listed above.
When is the best time to call Hong Kong from Seoul?: Between 10:00–18:00 in Seoul, which is 09:00–17:00 in Hong Kong. That is the only stretch where both cities are inside a 09:00–18:00 day.
Does Seoul observe daylight saving time?: No. Seoul stays on UTC+9 all year, so its clocks never move.
Does Hong Kong observe daylight saving time?: No. Hong Kong stays on UTC+8 all year, so its clocks never move.
If it is midday in Seoul, what time is it in Hong Kong?: It is 11:00 in Hong Kong, on the same calendar date. That holds for the current offsets; it does not change through the year, because neither city moves its clocks.
Which time zones do Seoul and Hong Kong use?: Seoul uses Asia/Seoul, currently UTC+9, and Hong Kong uses Asia/Hong_Kong, currently UTC+8. Those identifiers are the ones to use in code — abbreviations are ambiguous and offsets change.