<P> The Uniform Time Act of 1966 ruled that daylight saving time would run from the last Sunday of April until the last Sunday in October in the United States . The act was amended to make the first Sunday in April the beginning of daylight saving time as of 1987 . The Energy Policy Act of 2005 extended daylight saving time in the United States beginning in 2007 . So local times change at 2: 00 a.m. EST to 3: 00 a.m. EDT on the second Sunday in March and return at 2: 00 a.m. EDT to 1: 00 a.m. EST on the first Sunday in November . In Canada, the time changes as it does in the United States . </P> <P> In Canada, the following provinces and territories are part of the Eastern Time Zone: </P> <Ul> <Li> Ontario, most of </Li> <Li> Quebec, most of </Li> <Li> Nunavut, most of </Li> </Ul> <Li> Ontario, most of </Li>

Difference between eastern and pacific standard time zones