The difference between Eastern Standard Time and Eastern Daylight Time is one hour, as Eastern Standard Standard Time is one hour earlier. Eastern Daylight Time is used in the summer months. Conversely, Eastern Standard Time is used in the winter months, where clocks are set one hour earlier.
Various converters can be found through the Internet to change EDT times to EST times and vice versa, but their difference is very simple. EDT time will always be an hour later, or EST will be one hour earlier. The EDT time zone variation is used in various eastern parts of North America and Canada.
Eastern Daylight Time is observed in various states and areas, like Connecticut, Delaware, the District of Columbia, Georgia, Maine, Maryland, Massachusetts, New Hampshire, New Jersey, New York, North Carolina, Ohio, Pennsylvania, Rhode Island, South Carolina, Vermont, Virginia and West Virginia. There are other states where Eastern Daylight Time is observed, but it only applies for sections of these states, such as the southern and eastern parts of Florida, all counties in Indiana that aren't near Chicago, the eastern parts of Kentucky, all parts of Michigan besides the western counties and the eastern counties of Tennessee.
There are also some Canadian provinces that observe the rules of Eastern Daylight Time. These parts of Canada include most areas in Nunavut and Quebec, as well as areas within Ontario that are east of 90 West, including the Shebandowan and Upsala communities, which are are west of 90 West.