Toronto to AST

Comparing Time Zones: Toronto and AST

Toronto runs on Eastern Daylight Time (EDT) at UTC-04:00, currently observing daylight saving time. AST runs on Atlantic Standard Time (AST) at UTC-04:00. That puts Toronto no time difference AST — a difference of +0h at the current offsets.

In practice, when it is 9:00 AM in Toronto it is 9:00 AM in AST. Midnight in Toronto is 12:00 AM in AST.Toronto observes daylight saving time while AST does not, so the gap narrows or widens by an hour part of the year.

Toronto to AST time conversion table

About EST (Eastern Standard Time)

Eastern Standard Time (EST) is observed during the winter months in the eastern part of North America. It covers 23 US states and parts of Canada including Ontario and Quebec. EST is the most populous time zone in the United States, home to major financial centers like New York City and global organizations headquartered in Washington D.C. During daylight saving time (March–November), clocks shift to Eastern Daylight Time (EDT, UTC-04:00). The time zone also covers parts of the Caribbean and Central America including Panama, Jamaica, and the Cayman Islands.

About AST (Atlantic Standard Time)

Atlantic Standard Time (AST) covers Canada's Atlantic provinces (Nova Scotia, New Brunswick, Prince Edward Island, and most of Labrador), as well as several Caribbean nations. Puerto Rico and the US Virgin Islands use AST year-round without daylight saving time. The Canadian provinces switch to Atlantic Daylight Time (ADT) in summer.

Best time to call between Toronto and AST

Both Toronto and AST sit inside the 9 AM – 5 PM working day between 9:00 AM–5:00 PM EDT, which is 9:00 AM–5:00 PM AST. That gives roughly 8 hours of shared time — the safest window for a live call or meeting.

Business hours overlap

Toronto and AST share 8 hours of working-hours overlap (9:00 AM–5:00 PM EDT), so scheduling a live meeting is straightforward.