<Tr> <Th> DST ends </Th> <Td> Nov 5, 2017 </Td> </Tr> <P> The Atlantic Time Zone is a geographical region that keeps standard time--called Atlantic Standard Time (AST)--by subtracting four hours from Coordinated Universal Time (UTC), resulting in UTC - 4; during part of the year some parts of it observe daylight saving time by instead subtracting only three hours (UTC - 3). The clock time in this zone is based on the mean solar time of the 60th meridian west of the Greenwich Observatory . </P> <P> In Canada, the provinces of New Brunswick, Nova Scotia, and Prince Edward Island reckon time specifically as an offset of 4 hours from Greenwich Mean time (GMT - 4). Small portions of Quebec (eastern Côte - Nord and the Magdalen Islands) are also part of the Atlantic Standard Time Zone . Officially, the entirety of Newfoundland and Labrador observes Newfoundland Standard Time, but in practice most of Labrador uses the Atlantic Standard Time Zone . </P> <P> No portion of the continental United States is located in the Atlantic Time Zone; however the territories of Puerto Rico and the U.S. Virgin Islands do fall under Atlantic Standard Time . A Massachusetts commission from 2016 and other New England states have been studying the possibility of changing to Atlantic Time year round . </P>

Where does atlantic time zone start in canada
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