Atlantic Standard Time
noun /ətˌlæntɪk ˈstændəd taɪm/
  /ətˌlæntɪk ˈstændərd taɪm/
 [uncountable] (abbreviation AST)
 (also Atlantic time)
- the time used in winter in an area that includes the east of Canada, Puerto Rico and the Virgin Islands that is four hours earlier than UTCTopics Timec2