When does Daylight Savings Time start and end in each part of the world?
June 28, 2009 by admin
Filed under Questions and Answers
Explain it to me please! The whole scenario. Everything about it. If daylight savings time starts at 12:00 AM does 12:00 AM last for 2 hours? Do we have more daylight or more night time at which times? Which countries don’t observe it and why? What is DST anyways?
BlakLuv_06!! on Sun, 28th Jun 2009 1:36 am
The main purpose of Daylight Saving Time (called “Summer Time” in many places in the world) is to make better use of daylight. We change our clocks during the summer months to move an hour of daylight from the morning to the evening. Countries have different change dates. Daylight Saving Time gives us the opportunity to enjoy sunny summer evenings by moving our clocks an hour forward in the spring.
If you live near the equator, day and night are nearly the same length (12 hours). But elsewhere on Earth, there is much more daylight in the summer than in the winter. The closer you live to the North or South Pole, the longer the period of daylight in the summer. Thus, Daylight Saving Time (Summer Time) is usually not helpful in the tropics, and countries near the equator generally do not change their clocks.
Conservation-wise, the rationale behind the 1975 study of DST-related energy savings was that energy use and the demand for electricity for lighting homes is directly related to the times when people go to bed at night and rise in the morning. In the average home, 25 percent of electricity was used for lighting and small appliances, such as TVs and stereos. A good percentage of energy consumed by lighting and appliances occurred in the evening when families were home. By moving the clock ahead one hour, the amount of electricity consumed each day decreased.
As far as the places that do NOT acknowledge DST, In the U.S., Arizona doesn’t observe Daylight Saving Time, but the Navajo Nation (parts of which are in three states) does. However, the Hopi Reservation, which is entirely surrounded by the Navajo Nation, doesn’t observe DST. In effect, there is a donut-shaped area of Arizona that does observe DST, but the “hole” in the center does not.
ALSO, the Equatorial and tropical countries (lower latitudes) generally do not observe Daylight Saving Time. Since the daylight hours are similar during every season, there is no advantage to moving clocks forward during the summer. China has had a single time zone since May 1, 1980, observing summer Daylight Saving Time from 1986 through 1991; they do not observe DST now.
Hope this helped.