AST to MST
Convert Atlantic Time — Halifax to Arizona Time — Phoenix (no DST) — fast, accurate, and daylight-saving aware.
When it's 9:00 AM in Halifax, it's 5:00 AM in Phoenix. Phoenix is 4 hours behind Halifax. Use the converter above to turn any AST time into MST, or scan the hour-by-hour table below for the full day.
AST to MST at a glance
Planning a meeting between Halifax and Phoenix
Planning a call between Halifax and Phoenix? The best overlap during a standard 9-to-5 workday runs 1:00 PM–5:00 PM AST (9:00 AM–1:00 PM MST). Aim for that window to reach both sides during business hours.
Hour-by-hour: Halifax to Phoenix
A full day mapped from AST to MST.
Frequently asked
Is Phoenix ahead of or behind Halifax?
Phoenix is 4 hours behind Halifax.
What is 12:00 PM AST in MST?
12:00 PM in Halifax is 8:00 AM in Phoenix.
Does this converter account for daylight saving time?
Yes. Conversions use the IANA time zone database, so AST and MST automatically reflect the correct daylight-saving offset for the current date.