GMT - 4:00 Eastern Daylight / Summer Time

The Eastern Time Zone (ET) of the Western Hemisphere falls mostly along the east coast of Northern America. Its time offset is UTC-5 during standard time and UTC-4 during daylight saving time. The clock time in this zone is based on the mean solar time of the 75th degree meridian west of the Greenwich Observatory.

In the United States and Canada, this time zone is generally called Eastern Time (ET). Specifically, it is Eastern Standard Time (EST) when observing standard time (Winter), and Eastern Daylight Time (EDT) when observing daylight saving time (Summer).

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The zone is three hours ahead of the Pacific Time Zone, two hours ahead of the Mountain Time Zone and one hour ahead of the Central Time Zone.