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Atlantic time

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noun
  1. See under standard time.

Origin of Atlantic time

First recorded in 1905–10
Also called Atlantic Standard Time.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for atlantic standard time

Atlantic Standard Time

noun
  1. the local time used in eastern Canada, four hours behind Greenwich Mean TimeAbbreviation: AST
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012