Current Observance of Daylight Saving Time
Worldwide: William Willett would be happy to know that daylight saving time is now employed in about seventy countries around the world, including almost every major industrialized nation. It affects well over a billion people each year. Sunrises, sunsets, and day lengths of countries near the equator do not vary enough during the year to justify the use of DST, but even in those countries it is sometimes adopted, especially for energy conservation. It remains controversial in several locations, such as Queensland, Australia.
United States: In the United States, a daylight saving time period of almost seven months is in effect:
2 a.m. on the first Sunday in April
to
2 a.m. on the last Sunday in October
Currently, the entire country observes this DST period except for: Arizona, Hawaii, the Eastern time zone portion of Indiana, and the U. S. insular areas of Puerto Rico, the U. S. Virgin Islands, American Samoa, and Guam--all of which have chosen to stay on standard time all year.
In 2005, Indiana, which has long been a continuing hotbed of DST controversy, passed a law adopting statewide daylight saving time, starting in 2006.