IRST to AST
Convert Iran Time — Tehran to Atlantic Time — Halifax — fast, accurate, and daylight-saving aware.
When it's 9:00 AM in Tehran, it's 2:30 AM in Halifax. Halifax is 6½ hours behind Tehran. Use the converter above to turn any IRST time into AST, or scan the hour-by-hour table below for the full day.
IRST to AST at a glance
Planning a meeting between Tehran and Halifax
Planning a call between Tehran and Halifax? The best overlap during a standard 9-to-5 workday runs 3:30 PM–5:00 PM IRST (9:00 AM–10:30 AM AST). Aim for that window to reach both sides during business hours.
Hour-by-hour: Tehran to Halifax
A full day mapped from IRST to AST.
Frequently asked
Is Halifax ahead of or behind Tehran?
Halifax is 6½ hours behind Tehran.
What is 12:00 PM IRST in AST?
12:00 PM in Tehran is 5:30 AM in Halifax.
Does this converter account for daylight saving time?
Yes. Conversions use the IANA time zone database, so IRST and AST automatically reflect the correct daylight-saving offset for the current date.