High Quality Content by WIKIPEDIA articles! The Eastern Time Zone (ET) of the Western Hemisphere also known as North American Eastern Standard Time (NAEST) is a time zone that falls mostly along the east coast of North America and the west coast of South America. Its UTC time offset is ?5 hrs (UTC-05) during standard time and -4 hrs (UTC-04) during daylight saving time. The clock time in this zone is based on the mean solar time of the 75th meridian west of the Greenwich Observatory.

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