Daylight saving time (DST, also known as summer time)
is a worldwide system mostly practiced in the temperate
regions. It is a way of getting more light out of the
day by advancing clocks from its official standard time
by one hour during the summer.
Benjamin Franklin first conceived of the idea in 1784
but it was first adopted in the US during World War II.
In 1987 the United States Congress designated the period
of time that daylight saving time is in effect as the
first (previously had been the last) Sunday in April
to the last Sunday in October. However beginning in 2007,
Daylight Saving Time is extended one month and begins
for most of the United States at 2 a.m. on the second
Sunday in March and lasts until 2 a.m. on the first Sunday
of November.
The main intention of "springing forward" the clock one hour when daylight saving time starts is to provide more daylight hours to allow for more recreational activity after work or school during the warmer months. Governments also claim it is an energy conserving policy since there is less darkness and need for electricity during the day. Daylight saving time was extended in 1974 and 1975 as a result of the energy crisis.
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