USA changes its clock forward by one hour at 2:00 AM on the second Sunday in March. This is the beginning of “daylight saving time”. At 2:00 AM on the first Sunday in November “standard time” begins. There is a famous saying about changing the clock in USA: Spring forward and fall back.
Why they want to change the regular time to “daylight savings time” for 6 months? About 85% of the Americans have no idea. They just change the clock because every one does that.
Benjamin Franklin conceived this idea. The main reason for daylight savings time is energy conservation. If there is more sunlight in the evening, homes and shops do not have to turn on their lights as early and therefore save energy and fuel. USA went on daylight saving time during World Wars l and 2 to save energy and fuel for the war effort. The current national system of daylight saving system was implemented in 1973 through a law passed by the U.S. Congress. This was done at that time because of prevailing oil shortage at that time.
Many people hate daylight saving time. People are irritated to change several clocks in the home twice a year. Most of the home appliances like TV, DVD Player, Oven, Microwave Oven, A/C Thermostat, and Landline Phones have clocks. This is in addition to wrist watches and alarm clocks. Many feel it contributes to sleep disorders. Some people argue that there is not that much energy savings because of constant running of air conditioners during summer months. Also, if there is more evening time, people go on many different tasks and visit friends and therefore use more gasoline.
Quite a number of people at work will come late by one hour at the beginning of “daylight saving time”. Their excuse: I forgot to change the clock. I am yet to see any employee come one hour early at the beginning of “standard time” saying they forgot to change the clock.
There are many who suggest having a compromise. Change the clock by 30 minutes only one time and make that time a permanent one.
There are some states in USA and other U.S. territories that are exempt from this change. They do not change their clocks at all. They are: Arizona, Hawaii, American Samoa, Guam, Puerto Rico, the Virgin Islands, and the Commonwealth of Northern Mariana Islands. This is because either they have more natural sunlight or they are tropical.
Places that are located near Equator, The Tropic of Cancer, and The Tropic of Capricorn have more sunlight. The Tropic of Cancer runs through India. Therefore no time change is necessary for India.