AST to IRST
Convert Atlantic Time — Halifax to Iran Time — Tehran — fast, accurate, and daylight-saving aware.
When it's 9:00 AM in Halifax, it's 3:30 PM in Tehran. Tehran is 6½ hours ahead of Halifax. Use the converter above to turn any AST time into IRST, or scan the hour-by-hour table below for the full day.
AST to IRST at a glance
Planning a meeting between Halifax and Tehran
Planning a call between Halifax and Tehran? The best overlap during a standard 9-to-5 workday runs 9:00 AM–10:30 AM AST (3:30 PM–5:00 PM IRST). Aim for that window to reach both sides during business hours.
Hour-by-hour: Halifax to Tehran
A full day mapped from AST to IRST.
Frequently asked
Is Tehran ahead of or behind Halifax?
Tehran is 6½ hours ahead of Halifax.
What is 12:00 PM AST in IRST?
12:00 PM in Halifax is 6:30 PM in Tehran.
Does this converter account for daylight saving time?
Yes. Conversions use the IANA time zone database, so AST and IRST automatically reflect the correct daylight-saving offset for the current date.