It doesnt "Iceland, however, does not observe daylight saving time"
No, Guam does not observe Daylight Saving Time.
what is the origin of daylight savings time
Almost all of the United States of America observes Daylight Savings time. Hawaii, Arizona (except the Navajo Nation), and the territories of Puerto Rico, the American Samoa, the Northern Mariana Islands, the US Virgin Islands, and Guam do not participate in daylight savings.
Yes. All of Indiana does daylight savings time.
As of 2006, with the addition of Indiana, there are now 48 U.S. states that observe daylight saving time (all but Hawaii and Arizona, although the Navaho Nation, part of which is in Arizona, does do daylight saving time).
4pm during daylight savings and 5pm outside of daylight savings. EST time is GMT-5 and observes daylight savings and Zimbabwe is in GMT+2 or CAT and doesn't observe daylight savings.
what is the origin of daylight savings time
First of all it is Daylight SAVING time, not savings. Florida went on Daylight SAVING Time in 1970.
No. Arizona does not use daylight savings time.
Yes, British Columbia observed daylight savings time.
The daylight savings time for the year 2013 has already started and it was on March 10, 2013. The time in which daylight savings time will end is on November 3, 2013 at 2:00 AM.