Tehran to Shanghai
+4h 30mTehran
IRSTSOURCEShanghai
CSTGreen rows indicate typical business hours (9 AM - 5 PM)
IRST and CST on the World Map
The map below highlights the IRST (Iran Standard Time) and CST (China Standard Time) timezone regions across the globe.
IRST – Iran Standard Time
UTC+03:30Iran Standard Time (IRST) is the time zone for Iran, 3 hours and 30 minutes ahead of UTC.
- •IRST is one of only a few time zones with a 30-minute offset.
- •Iran observes daylight saving time, switching to IRDT (UTC+04:30).
- •Tehran has a metropolitan population of over 16 million.
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.
About Tehran
WikipediaTehran operates on Iran Standard Time (IRST), UTC+3:30. Iran's unique half-hour offset makes Tehran time distinctive for regional business coordination.
Iran Standard Time (IRST) is one of few timezones with a 30-minute offset (UTC+3:30).
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.
Comparing Time Zones: Tehran and Shanghai
Tehran runs on Iran Standard Time (IRST) at UTC+03:30. Shanghai runs on China Standard Time (CST) at UTC+08:00. That puts Tehran 4 hours 30 minutes ahead of Shanghai — a difference of +4h 30m at the current offsets.
In practice, when it is 9:00 AM in Tehran it is 1:30 PM in Shanghai. Midnight in Tehran is 4:30 AM in Shanghai. Neither zone observes daylight saving time, so the offset between them stays constant all year.
Tehran to Shanghai time conversion table
| Tehran (IRST) | Shanghai (CST) | Day |
|---|---|---|
| 12:00 AM | 4:30 AM | same day |
| 6:00 AM | 10:30 AM | same day |
| 7:00 AM | 11:30 AM | same day |
| 8:00 AM | 12:30 PM | same day |
| 9:00 AM | 1:30 PM | same day |
| 12:00 PM | 4:30 PM | same day |
| 3:00 PM | 7:30 PM | same day |
| 5:00 PM | 9:30 PM | same day |
| 6:00 PM | 10:30 PM | same day |
| 9:00 PM | 1:30 AM | next day |
Why people convert Tehran to Shanghai time
- Scheduling a call from Tehran to Shanghai: a 10:00 AM start in Tehran lands at 2:30 PM in Shanghai, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both Tehran and Shanghai are inside the 9-to-5 working day between 9:00 AM and 12:30 PM IRST time (1:30 PM–5:00 PM CST). That is roughly 3 hours 30 minutes of usable overlap.
- Keeping family and friends in sync: knowing that 8:00 PM in Tehran is 12:30 AM in Shanghai makes it easy to avoid calling at 3 AM.
- Always state the zone abbreviation, not just the hour. "3:00 PM IRST" is unambiguous; "3 PM" across a +4h 30m gap is not.
- Block 9:00 AM–12:30 PM IRST as the recurring meeting window if you work primarily from Tehran and need Shanghai colleagues present.
About IRST (Iran Standard Time)
Iran Standard Time (IRST) is one of the few time zones with a 30-minute offset. Iran observes daylight saving time (IRDT, UTC+04:30) from late March to late September. Tehran, the capital, is one of the largest cities in the Middle East.
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.
Best time to call between Tehran and Shanghai
Both Tehran and Shanghai sit inside the 9 AM – 5 PM working day between 9:00 AM–12:30 PM IRST, which is 1:30 PM–5:00 PM CST. That gives roughly 3 hours and 30 minutes of shared time — the safest window for a live call or meeting.
Business hours overlap
Tehran and Shanghai overlap for about 3 hours during the working day — enough for meetings if you avoid the edges of the window.
Tehran is 4 hours 30 minutes ahead of Shanghai (IRST UTC+03:30 → CST UTC+08:00). The shared working window is 9:00 AM–12:30 PM IRST. 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 Tehran and Shanghai?
Tehran (IRST, UTC+03:30) is 4 hours 30 minutes ahead of Shanghai (CST, UTC+08:00). The gap is currently +4h 30m.
How do I convert Tehran time to Shanghai time?
Add +4h 30m to Tehran local time. For example, 9:00 AM in Tehran is 1:30 PM in Shanghai.
What time is it in Shanghai right now?
Shanghai uses CST at UTC+08:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +4h 30m offset from Tehran.
What is the best time to call Shanghai from Tehran?
Call between 9:00 AM and 12:30 PM IRST — that maps to 1:30 PM–5:00 PM CST and keeps both parties inside the working day.
Which is ahead, Tehran or Shanghai?
Tehran is 4 hours 30 minutes ahead of Shanghai. When it is 12:00 PM in Tehran it is 4:30 PM in Shanghai.
Do Tehran and Shanghai use different time zones?
Tehran (Iran) uses IRST at UTC+03:30, while Shanghai (China) uses CST at UTC+08:00. The IANA identifiers are Asia/Tehran and Asia/Shanghai.
Does daylight saving time affect the Tehran–Shanghai difference?
Neither zone observes daylight saving time, so the +4h 30m offset between Tehran and Shanghai is fixed all year.
Which other cities share Tehran's time zone?
IRST also covers Tehran, Isfahan, Mashhad, Tabriz, Shiraz, Karaj.
Which countries use IRST, Tehran's zone?
IRST is used in Iran.
Is there a day difference between Tehran and Shanghai?
Not normally. The +4h 30m gap only pushes the date over for late-evening times.
What is the time difference between Tehran and Shanghai?
Shanghai is +4h 30m from Tehran.
What timezone is Tehran in?
Tehran operates on Iran Standard Time (IRST), UTC+3:30. Iran's unique half-hour offset makes Tehran time distinctive for regional business coordination.
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 are the business hours in Tehran?
Standard business hours in Tehran are 8:00 AM - 4:00 PM IRST.
What are the business hours in Shanghai?
Standard business hours in Shanghai are 9:00 AM - 6:00 PM CST.
What is the best time to schedule a call between Tehran and Shanghai?
The best overlap for a call is when both cities are in business hours. Tehran works 8:00 AM - 4:00 PM IRST and Shanghai works 9:00 AM - 6:00 PM CST (+4h 30m difference). Try scheduling during the overlapping window for maximum convenience.
What currencies are used in Tehran and Shanghai?
Tehran uses IRR (﷼) while Shanghai uses CNY (¥). Check current exchange rates when planning travel or business between these cities.
How do Tehran and Shanghai compare in size?
Tehran has a population of approximately 9.4 million (metro: 16.8 million), while Shanghai has approximately 24.9 million (metro: 28.5 million).
What are the major landmarks in Tehran and Shanghai?
Tehran is known for Azadi Tower, Golestan Palace, Grand Bazaar. Shanghai is famous for The Bund, Oriental Pearl Tower, Yu Garden.
Do Tehran and Shanghai have stock exchanges?
Yes. Tehran has the TSE (Tehran Stock Exchange) and Shanghai has the SSE (Shanghai Stock Exchange). The +4h 30m time difference affects trading hour overlaps between these exchanges.
Which countries use IRST (Iran Standard Time)?
IRST is used in Iran.
Does IRST observe daylight saving time?
Yes, IRST switches to IRDT during summer months.
What are some interesting facts about IRST?
IRST is one of only a few time zones with a 30-minute offset. Iran observes daylight saving time, switching to IRDT (UTC+04:30).
Which cities are in the CST timezone?
Major cities in the CST timezone include Shanghai, Beijing, Shenzhen, Guangzhou, Chengdu, Hong Kong, Taipei, Wuhan.
What is the UTC offset for CST?
China Standard Time (CST) is at UTC+08:00.
What should I know about the CST timezone?
China uses a single time zone despite spanning 5 geographical zones. In Xinjiang (western China), sunset can be as late as midnight in summer.
When is it midnight in Tehran, what time is it in Shanghai?
When it is 12:00 AM (midnight) in Tehran (IRST), it is +4h 30m later in Shanghai (CST).
Related Developer Tools
Explore more tools that work great with timezone conversions for international teams:
Related Timezone Conversions
More Tehran time conversions
- tehran to irst
- tehran to iran
- tehran to dubai
- tehran to mumbai
- tehran to delhi
- tehran to bangalore
- tehran to kathmandu
- tehran to bangkok
- tehran to singapore
- tehran to hong kong
- tehran to beijing
- tehran to tokyo
- tehran to osaka
- tehran to new york
- tehran to london
- tehran to sydney
- tehran to los angeles
- tehran to paris
- tehran to berlin
- tehran to toronto
- new york to tehran
- london to tehran
- dubai to tehran
- tokyo to tehran
- singapore to tehran
- sydney to tehran
- los angeles to tehran
- paris to tehran
- delhi to tehran
- mumbai to tehran
- berlin to tehran
- hong kong to tehran
- toronto to tehran
- kathmandu to tehran
See every conversion from Tehran →·See every conversion from Shanghai →