Day Light Saving:

In US, the days are very short in winter, and very long in summers so as to make the maximum use of the day light it is changed twice every year.

    * The clock is reset back in Fall Season, by one hour on the last Sunday of October at 2:00 A.M.

    * Clock is once again reset forward in Spring Season, by one hour on the first Sunday of April at 2:00 A.M.

Change to daylight saving time

The bill amends the Uniform Time Act of 1966 by changing the start and end dates of daylight saving time starting in 2007. Clocks will be set ahead one hour on the second Sunday of March instead of the current first Sunday of April. Clocks will be set back one hour on the first Sunday in November, rather than the last Sunday of October. This will make electronic clocks that had pre-programmed dates for adjusting to daylight saving time obsolete and will require updates to computer operating systems. The date for the end of daylight saving time has the effect of increasing evening light on Halloween (October 31). This section of the act is controversial, primarily because there is doubt if daylight savings actually results in a net energy savings. The additional effort of changing quite possibly billions of clocks on embedded systems as well as enterprise servers may cause significant impact to the productivity of any region that adopts these changes.