Shanghai to Seoul
+1hShanghai
CSTSOURCESeoul
KSTGreen rows indicate typical business hours (9 AM - 5 PM)
CST and KST on the World Map
The map below highlights the CST (China Standard Time) and KST (Korea Standard Time) timezone regions across the globe.
CST – China Standard Time
UTC+08:00China Standard Time (CST) covers all of mainland China, 8 hours ahead of UTC.
- •China uses a single time zone despite spanning 5 geographical zones.
- •In Xinjiang (western China), sunset can be as late as midnight in summer.
- •China abolished daylight saving time in 1991.
- •The Shanghai Stock Exchange operates on CST/Beijing Time.
KST – Korea Standard Time
UTC+09:00Korea Standard Time (KST) is the time zone for South Korea, 9 hours ahead of UTC.
- •South Korea does not observe daylight saving time.
- •Seoul is home to Samsung, LG, and Hyundai headquarters.
- •KST is the same offset as JST (UTC+09:00).
About Shanghai
WikipediaShanghai operates on China Standard Time (CST), UTC+8. As China's economic powerhouse and home to the SSE, Shanghai time is essential for global investors.
The Maglev train from Shanghai airport reaches 431 km/h, the fastest commercial train in the world.
About Seoul
WikipediaSeoul operates on Korea Standard Time (KST), UTC+9, same as Japan. As a global tech and entertainment hub, Seoul coordinates with East Asian markets.
Seoul has the fastest average internet speed in the world.
Comparing Time Zones: Shanghai and Seoul
Shanghai runs on China Standard Time (CST) at UTC+08:00. Seoul runs on Korean Standard Time (KST) at UTC+09:00. That puts Shanghai 1 hour ahead of Seoul — a difference of +1h at the current offsets.
In practice, when it is 9:00 AM in Shanghai it is 10:00 AM in Seoul. Midnight in Shanghai is 1:00 AM in Seoul. Neither zone observes daylight saving time, so the offset between them stays constant all year.
Shanghai to Seoul time conversion table
| Shanghai (CST) | Seoul (KST) | Day |
|---|---|---|
| 12:00 AM | 1:00 AM | same day |
| 6:00 AM | 7:00 AM | same day |
| 7:00 AM | 8:00 AM | same day |
| 8:00 AM | 9:00 AM | same day |
| 9:00 AM | 10:00 AM | same day |
| 12:00 PM | 1:00 PM | same day |
| 3:00 PM | 4:00 PM | same day |
| 5:00 PM | 6:00 PM | same day |
| 6:00 PM | 7:00 PM | same day |
| 9:00 PM | 10:00 PM | same day |
Why people convert Shanghai to Seoul time
- Scheduling a call from Shanghai to Seoul: a 10:00 AM start in Shanghai lands at 11:00 AM in Seoul, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both Shanghai and Seoul are inside the 9-to-5 working day between 9:00 AM and 4:00 PM CST time (10:00 AM–5:00 PM KST). That is roughly 7 hours of usable overlap.
- Watching a live event or market open: Shanghai viewers need 10:00 AM in Seoul to catch a 9:00 AM start there, and 11:00 PM if the event is anchored to Shanghai.
- Always state the zone abbreviation, not just the hour. "3:00 PM CST" is unambiguous; "3 PM" across a +1h gap is not.
- Block 9:00 AM–4:00 PM CST as the recurring meeting window if you work primarily from Shanghai and need Seoul colleagues present.
About CST (China Standard Time)
China Standard Time (CST, also known as Beijing Time) is used across all of mainland China despite the country spanning five geographical time zones. This single-timezone policy was adopted in 1949. China does not observe daylight saving time. CST is shared with Hong Kong (HKT), Macau, Taiwan, Singapore, Malaysia, and the Philippines, making UTC+08:00 one of the most used offsets in the world.
About KST (Korea Standard Time)
Korea Standard Time (KST) is the time zone used in South Korea. It shares the same UTC offset as Japan Standard Time but is a distinct time zone. South Korea does not observe daylight saving time. Seoul, the capital, is a major global tech and business hub.
Best time to call between Shanghai and Seoul
Both Shanghai and Seoul sit inside the 9 AM – 5 PM working day between 9:00 AM–4:00 PM CST, which is 10:00 AM–5:00 PM KST. That gives roughly 7 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
Shanghai and Seoul share 7 hours of working-hours overlap (9:00 AM–4:00 PM CST), so scheduling a live meeting is straightforward.
Shanghai is 1 hour ahead of Seoul (CST UTC+08:00 → KST UTC+09:00). The shared working window is 9:00 AM–4:00 PM CST. Remember to re-check around daylight-saving transitions.
Learn More About Time
Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:
Frequently Asked Questions
What is the time difference between Shanghai and Seoul?
Shanghai (CST, UTC+08:00) is 1 hour ahead of Seoul (KST, UTC+09:00). The gap is currently +1h.
How do I convert Shanghai time to Seoul time?
Add +1h to Shanghai local time. For example, 9:00 AM in Shanghai is 10:00 AM in Seoul.
What time is it in Seoul right now?
Seoul uses KST at UTC+09:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +1h offset from Shanghai.
What is the best time to call Seoul from Shanghai?
Call between 9:00 AM and 4:00 PM CST — that maps to 10:00 AM–5:00 PM KST and keeps both parties inside the working day.
Which is ahead, Shanghai or Seoul?
Shanghai is 1 hour ahead of Seoul. When it is 12:00 PM in Shanghai it is 1:00 PM in Seoul.
Do Shanghai and Seoul use different time zones?
Shanghai (China) uses CST at UTC+08:00, while Seoul (South Korea) uses KST at UTC+09:00. The IANA identifiers are Asia/Shanghai and Asia/Seoul.
Does daylight saving time affect the Shanghai–Seoul difference?
Neither zone observes daylight saving time, so the +1h offset between Shanghai and Seoul is fixed all year.
Which other cities share Shanghai's time zone?
CST also covers Shanghai, Beijing, Shenzhen, Guangzhou, Chengdu, Hong Kong, Taipei, Wuhan and 2 more.
Which countries use CST, Shanghai's zone?
CST is used in China, Hong Kong, Macau, Taiwan.
Is there a day difference between Shanghai and Seoul?
Not normally. The +1h gap only pushes the date over for late-evening times.
What is the time difference between Shanghai and Seoul?
Seoul is +1h from Shanghai.
What timezone is Shanghai in?
Shanghai operates on China Standard Time (CST), UTC+8. As China's economic powerhouse and home to the SSE, Shanghai time is essential for global investors.
What timezone is Seoul in?
Seoul operates on Korea Standard Time (KST), UTC+9, same as Japan. As a global tech and entertainment hub, Seoul coordinates with East Asian markets.
What are the business hours in Shanghai?
Standard business hours in Shanghai are 9:00 AM - 6:00 PM CST.
What are the business hours in Seoul?
Standard business hours in Seoul are 9:00 AM - 6:00 PM KST.
What is the best time to schedule a call between Shanghai and Seoul?
The best overlap for a call is when both cities are in business hours. Shanghai works 9:00 AM - 6:00 PM CST and Seoul works 9:00 AM - 6:00 PM KST (+1h difference). Try scheduling during the overlapping window for maximum convenience.
What currencies are used in Shanghai and Seoul?
Shanghai uses CNY (¥) while Seoul uses KRW (₩). Check current exchange rates when planning travel or business between these cities.
How do Shanghai and Seoul compare in size?
Shanghai has a population of approximately 24.9 million (metro: 28.5 million), while Seoul has approximately 9.7 million (metro: 25.5 million).
What are the major landmarks in Shanghai and Seoul?
Shanghai is known for The Bund, Oriental Pearl Tower, Yu Garden. Seoul is famous for Gyeongbokgung Palace, N Seoul Tower, Bukchon Hanok Village.
Do Shanghai and Seoul have stock exchanges?
Yes. Shanghai has the SSE (Shanghai Stock Exchange) and Seoul has the KRX (Korea Exchange). The +1h time difference affects trading hour overlaps between these exchanges.
Which countries use CST (China Standard Time)?
CST is used in China, Hong Kong, Macau, Taiwan.
Does CST observe daylight saving time?
No, CST does not observe daylight saving time and remains at UTC+08:00 year-round.
What are some interesting facts about CST?
China uses a single time zone despite spanning 5 geographical zones. In Xinjiang (western China), sunset can be as late as midnight in summer.
Which cities are in the KST timezone?
Major cities in the KST timezone include Seoul, Busan, Incheon, Daegu, Daejeon, Pyongyang.
What is the UTC offset for KST?
Korea Standard Time (KST) is at UTC+09:00.
What should I know about the KST timezone?
South Korea does not observe daylight saving time. Seoul is home to Samsung, LG, and Hyundai headquarters.
When is it midnight in Shanghai, what time is it in Seoul?
When it is 12:00 AM (midnight) in Shanghai (CST), it is +1h later in Seoul (KST).
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