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East·ern time the standard time in a zone including the eastern states of the U.S. and parts of Canada, specifically: ∎  (Eastern Standard Time, abbrev.: EST) , standard time based on the mean solar time at the meridian 75° W, five hours behind GMT. ∎  (Eastern Daylight Time, abbrev.: EDT) Eastern time during daylight saving time, four hours behind GMT.

Eastern time

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Eastern time