What is the time difference between Shanghai and Seoul?

Seoul is 1 hour ahead of Shanghai. 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 Seoul from Shanghai?

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

Does Shanghai observe daylight saving time?

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

Does Seoul observe daylight saving time?

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

If it is midday in Shanghai, what time is it in Seoul?

It is 13:00 in Seoul, 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 Shanghai and Seoul use?

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

Convert Shanghai time to Seoul time

Seoul is 1 hour ahead of Shanghai right now, so midday in Shanghai lands in the afternoon in Seoul.

Convert a time

From

Date

Time

Converted time

—

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 Shanghai, and what the clock reads in Seoul at that same moment.

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

Daylight saving time

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

Shanghai

Does not observe daylight saving time

Standard: UTC+8

Seoul

Does not observe daylight saving time

Standard: UTC+9

When you can actually talk

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

Shanghai 09:00–17:00Seoul 10:00–18:00

Reference

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

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

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

Common questions

What is the time difference between Shanghai and Seoul?: Seoul is 1 hour ahead of Shanghai. 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 Seoul from Shanghai?: Between 09:00–17:00 in Shanghai, which is 10:00–18:00 in Seoul. That is the only stretch where both cities are inside a 09:00–18:00 day.
Does Shanghai observe daylight saving time?: No. Shanghai stays on UTC+8 all year, so its clocks never move.
Does Seoul observe daylight saving time?: No. Seoul stays on UTC+9 all year, so its clocks never move.
If it is midday in Shanghai, what time is it in Seoul?: It is 13:00 in Seoul, 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 Shanghai and Seoul use?: Shanghai uses Asia/Shanghai, currently UTC+8, and Seoul uses Asia/Seoul, currently UTC+9. Those identifiers are the ones to use in code — abbreviations are ambiguous and offsets change.