Atlantic time zones:

AST – Atlantic Standard Time


AST is currently not observed because locations are on Daylight Saving Time.

During this time of year, locations on AST are now on ADT (Atlantic Daylight Time) instead.

Currently no cities are observing AST

Locations going to AST later

Current time in Hamilton: Saturday, October 25, 2014 at 6:56:35 AM ADT
Hamilton will stay on ADT until Sunday, November 2, 2014 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 during summer daylight saving time/summer time is observed, and ADT is used instead.

Time zone abbreviations: AST, HNA

Full name is Atlantic Standard Time
HNA – Heure Normale de l'Atlantique (French)

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?

Areas using AST in the winter and ADT during the summer

Time zone maps are under development and will be available later

Example location in AST

Other time zones in Atlantic

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

Time zones in other regions

Related links