Daylight saving time įor those in the United States, daylight saving time for the Eastern Time Zone was introduced by the Uniform Time Act of 1966, which specified that daylight saving time would run from the last Sunday of April until the last Sunday in October. A similar bill was proposed for the Canadian province of Ontario by its legislative assembly in late 2020, which would have a similar effect on the province if passed. In March 2018, the Florida Legislature passed a bill requesting authorization from Congress for year-round daylight saving time, which would effectively put Florida on Atlantic Standard Time year-round (except for west of the Apalachicola River, which would be on Eastern Standard Time year-round). Within the United States, the Eastern Time Zone is the most populous region, with nearly half of the country's population. In 2000, Wayne County, on the Tennessee border, switched from Central to Eastern. For example, the easternmost and northernmost counties in Kentucky were added to the zone in the 1940s, and in 1961 most of the state went Eastern. The boundaries of the Eastern Time Zone have moved westward since the Interstate Commerce Commission (ICC) took over time-zone management from railroads in 1938. Southern parts of the zone (Panama and the Caribbean) do not observe daylight saving time. On the first Sunday in November, at 2:00 a.m. On the second Sunday in March, at 2:00 a.m.
Eastern Daylight Time ( EDT), when observing daylight saving time (spring/summer), are four hours behind Coordinated Universal Time ( UTC−04:00).Eastern Standard Time ( EST), when observing standard time (autumn/winter), are five hours behind Coordinated Universal Time ( UTC−05:00).
The Eastern Time Zone ( ET) is a time zone encompassing part or all of 23 states in the eastern part of the United States, parts of eastern Canada, the state of Quintana Roo in Mexico, Panama and Colombia, mainland Ecuador, Peru, and a small portion of westernmost Brazil in South America, along with certain Caribbean and Atlantic islands. DST is observed in parts of this time zone.