Shanghai to Iran
-4h 30mShanghai
CSTSOURCEIran
IRSTGreen rows indicate typical business hours (9 AM - 5 PM)
CST and IRST on the World Map
The map below highlights the CST (China Standard Time) and IRST (Iran 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.
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.
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.
Shanghai to Iran Time Difference – Complete Guide
Shanghai runs on China Standard Time (CST) at UTC+08:00. Iran runs on Iran Standard Time (IRST) at UTC+03:30. That puts Shanghai 4 hours 30 minutes behind Iran — a difference of -4h 30m at the current offsets.
In practice, when it is 9:00 AM in Shanghai it is 4:30 AM in Iran. Midnight in Shanghai is 7:30 PM in Iran. Neither zone observes daylight saving time, so the offset between them stays constant all year.
Shanghai to Iran time conversion table
| Shanghai (CST) | Iran (IRST) | Day |
|---|---|---|
| 12:00 AM | 7:30 PM | previous day |
| 6:00 AM | 1:30 AM | same day |
| 7:00 AM | 2:30 AM | same day |
| 8:00 AM | 3:30 AM | same day |
| 9:00 AM | 4:30 AM | same day |
| 12:00 PM | 7:30 AM | same day |
| 3:00 PM | 10:30 AM | same day |
| 5:00 PM | 12:30 PM | same day |
| 6:00 PM | 1:30 PM | same day |
| 9:00 PM | 4:30 PM | same day |
Why people convert Shanghai to Iran time
- Scheduling a call from Shanghai to Iran: a 10:00 AM start in Shanghai lands at 5:30 AM in Iran, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both Shanghai and Iran are inside the 9-to-5 working day between 1:30 PM and 5:00 PM CST time (9:00 AM–12:30 PM IRST). That is roughly 3 hours 30 minutes of usable overlap.
- Coordinating a Shanghai-based team with Iran contacts: quoting times in the other side's local clock — not your own — removes the single biggest source of missed meetings.
- Always state the zone abbreviation, not just the hour. "3:00 PM CST" is unambiguous; "3 PM" across a -4h 30m gap is not.
- Block 1:30 PM–5:00 PM CST as the recurring meeting window if you work primarily from Shanghai and need Iran 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 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.
Best time to call between Shanghai and Iran
Both Shanghai and Iran sit inside the 9 AM – 5 PM working day between 1:30 PM–5:00 PM CST, which is 9:00 AM–12:30 PM IRST. That gives roughly 3 hours and 30 minutes of shared time — the safest window for a live call or meeting.
Business hours overlap
Shanghai and Iran overlap for about 3 hours during the working day — enough for meetings if you avoid the edges of the window.
Shanghai is 4 hours 30 minutes behind Iran (CST UTC+08:00 → IRST UTC+03:30). The shared working window is 1:30 PM–5:00 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 Iran?
Shanghai (CST, UTC+08:00) is 4 hours 30 minutes behind Iran (IRST, UTC+03:30). The gap is currently -4h 30m.
How do I convert Shanghai time to Iran time?
Add -4h 30m to Shanghai local time. For example, 9:00 AM in Shanghai is 4:30 AM in Iran.
What time is it in Iran right now?
Iran uses IRST at UTC+03:30. Use the live converter at the top of this page — it updates in real time and already accounts for the -4h 30m offset from Shanghai.
What is the best time to call Iran from Shanghai?
Call between 1:30 PM and 5:00 PM CST — that maps to 9:00 AM–12:30 PM IRST and keeps both parties inside the working day.
Which is behind, Shanghai or Iran?
Shanghai is 4 hours 30 minutes behind Iran. When it is 12:00 PM in Shanghai it is 7:30 AM in Iran.
Do Shanghai and Iran use different time zones?
Shanghai (China) uses CST at UTC+08:00, while Iran (Iran) uses IRST at UTC+03:30. The IANA identifiers are Asia/Shanghai and Asia/Tehran.
Does daylight saving time affect the Shanghai–Iran difference?
Neither zone observes daylight saving time, so the -4h 30m offset between Shanghai and Iran 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 Iran?
Not normally. The -4h 30m gap only pushes the date over the previous day.
What is the time difference between Shanghai and Iran?
Iran is -4h 30m 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 Iran in?
Iran operates on its local timezone.
What are the business hours in Shanghai?
Standard business hours in Shanghai are 9:00 AM - 6:00 PM CST.
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 IRST timezone?
Major cities in the IRST timezone include Tehran, Isfahan, Mashhad, Tabriz, Shiraz, Karaj.
What is the UTC offset for IRST?
Iran Standard Time (IRST) is at UTC+03:30. During daylight saving time, it shifts to IRDT.
What should I know about the IRST timezone?
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).
When is it midnight in Shanghai, what time is it in Iran?
When it is 12:00 AM (midnight) in Shanghai (CST), it is -4h 30m later in Iran (IRST).
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