IRST to CST
Convert Iran Time — Tehran to China Time — Shanghai — fast, accurate, and daylight-saving aware.
When it's 9:00 AM in Tehran, it's 1:30 PM in Shanghai. Shanghai is 4½ hours ahead of Tehran. Use the converter above to turn any IRST time into CST, or scan the hour-by-hour table below for the full day.
IRST to CST at a glance
Planning a meeting between Tehran and Shanghai
Planning a call between Tehran and Shanghai? The best overlap during a standard 9-to-5 workday runs 9:00 AM–12:30 PM IRST (1:30 PM–5:00 PM CST). Aim for that window to reach both sides during business hours.
Hour-by-hour: Tehran to Shanghai
A full day mapped from IRST to CST.
Frequently asked
Is Shanghai ahead of or behind Tehran?
Shanghai is 4½ hours ahead of Tehran.
What is 12:00 PM IRST in CST?
12:00 PM in Tehran is 4:30 PM in Shanghai.
Does this converter account for daylight saving time?
Yes. Conversions use the IANA time zone database, so IRST and CST automatically reflect the correct daylight-saving offset for the current date.