North American time zones:

AST – Atlantic Standard Time



Current time in Blanc-Sablon

Saturday, June 24, 2017 at 8:15:17 AM AST

Blanc-Sablon is on AST all of year 2017

Locations going to AST later

Current time in Halifax: Saturday, June 24, 2017 at 9:15:17 AM ADT
Halifax will stay on ADT until Sunday, November 5, 2017 going to AST

Find local time and time zone for a location

We recommend looking up by location name, not time zone name.

Time zone offset: UTC - 4 hours

AST is 4 hours behind of Coordinated Universal Time (UTC)

Note that most places observe daylight saving time/summer time during summer, and are therefore using ADT instead in the summer. See below for details.

Time zone abbreviations: AST, HNA

Full name is Atlantic Standard Time
HNA – Heure Normale de l'Atlantique (French)
AST – Tiempo Estándar del Atlántico (Spanish)

Email time zone indicator: -0400

An email sent from someone in the AST time zone will have the time zone listed as "-0400" in the headers of the email. (However, "-0400" does not have to be in AST, as other time zones could have the same UTC offset).

For actual dates DST might be observed, look at the examples below

Where and when is AST observed?

Canadian provinces using AST in the winter and ADT during the summer

Regions using AST all year

Areas using AST in the winter and ADT during the summer

Time zone maps are under development and will be available later

Example locations in AST

Other time zones in North America

Go directly through the links below, or see the North America time zone list

Time zones in other regions

Related links