Details about the exact time of when to turn clocks forward or back for daylight saving time (spring forward/fall back) or time zone changes. ... Sunday, April 27, 1947, 3:00:00 am local daylight time instead. Sunrise and sunset were about 1 hour later on Apr 27, 1947 than the day before. There was more light in the evening. read more
[citation needed] For example, in the U.S. the period of Daylight Saving Time is defined by the Energy Policy Act of 2005. The period for Daylight Saving Time was extended by changing the start date from the first Sunday of April to the second Sunday of March, and the end date from the last Sunday in October to the first Sunday in November. read more
The Uniform Time Act of 1966 established the system of uniform Daylight Saving Time throughout the US. In the U.S., daylight saving time starts on the second Sunday in March and ends on the first Sunday in November, with the time changes taking place at 2:00 a.m. local time. read more