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