Time zone converter
ICT to IRST
Convert Indochina Time — Hanoi to Iran Time — Tehran — fast, accurate, and daylight-saving aware.
When it's 9:00 AM in Hanoi, it's 5:30 AM in Tehran. Tehran is 3½ hours behind Hanoi. Use the converter above to turn any ICT time into IRST, or scan the hour-by-hour table below for the full day.
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Indochina Time — Hanoi ·
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Iran Time — Tehran ·
Convert a specific timein Hanoi → — in Tehran
ICT to IRST at a glance
9:00 AM ICT
5:30 AM
IRST · Tehran
12:00 PM ICT
8:30 AM
IRST · Tehran
5:00 PM ICT
1:30 PM
IRST · Tehran
Planning a meeting between Hanoi and Tehran
Planning a call between Hanoi and Tehran? The best overlap during a standard 9-to-5 workday runs 12:30 PM–5:00 PM ICT (9:00 AM–1:30 PM IRST). Aim for that window to reach both sides during business hours.
Hour-by-hour: Hanoi to Tehran
A full day mapped from ICT to IRST.
Frequently asked
Is Tehran ahead of or behind Hanoi?
Tehran is 3½ hours behind Hanoi.
What is 12:00 PM ICT in IRST?
12:00 PM in Hanoi is 8:30 AM in Tehran.
Does this converter account for daylight saving time?
Yes. Conversions use the IANA time zone database, so ICT and IRST automatically reflect the correct daylight-saving offset for the current date.