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Arizona (with the exception of the Navajo Nation) and Hawaii do not observe Daylight Saving Time.
Indiana adopted its use beginning in 2006. American Samoa, Guam, Puerto Rico, and the Virgin Islands still do not observe DST.

en.wikipedia.org/wiki/Daylight_saving_time_in_the_United_States

Daylight saving time in the United States is the practice of setting the clock forward by one hour during the warmer part of the year, so that evenings have more daylight and mornings have less. Most areas of the United States observe daylight saving time (DST), the .... As of 2014, the following states and territories are not observing DST: ...

www.tulsalibrary.org/faq/which-states-do-not-observe-daylight-saving-time

Currently, Arizona, Hawaii, the eastern time zone portion of Indiana, Puerto Rico, the U.S. Virgin Islands and American Samoa do not observe Daylight Saving ...

www.timeanddate.com/time/us/arizona-no-dst.html

Almost all of the US state of Arizona does not use Daylight Saving Time (DST) ... If DST is observed, the state has to schedule DST in sync with the rest of the US:  ...

thefw.com/2-states-dont-observe-daylight-saving-time

Mar 10, 2017 ... The roots of Daylight Saving Time (and it is Daylight Saving Time, not Daylight Savings Time) go all the way back to the grandfather of ideas, ...

www.usatoday.com/story/news/nation-now/2017/03/09/arizona-no-daylight-saving-time/98964644

Mar 9, 2017 ... Western Indiana used to be even more confusing as some counties and cities observed daylight saving while others did not. The Energy Policy ...

news.nationalgeographic.com/news/2015/03/150306-daylight-savings-time-spring-forward-united-states-science-nation

Mar 6, 2015 ... "In 1965 there were 130 cities in the country with populations of 100,000 or more, " Downing ... "Fifty-nine did not observe daylight saving.

www.12news.com/news/local/arizona/heres-why-arizona-doesnt-observe-daylight-saving-time/344384243

Mar 10, 2017 ... DST started when "war time" was established in the U.S. in 1918 to save ... we'll be on the same time as the states west of us, three hours behind the East Coast. ... in the northeast quarter of the state does observe daylight-saving time. The Hopi Nation, fully surrounded by the Navajo reservation, does not.

www.azcentral.com/story/travel/2017/03/06/why-arizona-doesnt-observe-daylight-saving-time/98639074

Mar 6, 2017 ... Western Indiana used to be even more confusing as some counties and cities observed daylight saving while others did not. The Energy Policy ...

www.aol.com/article/lifestyle/2017/03/10/states-opt-out-daylight-saving-time/21879629

Mar 10, 2017 ... Well, not everyone's. Arizona and Hawaii don't follow daylight saving time like the rest of the U.S. ... Most of Canada follows the same dates as the U.S., and many European countries follow suit a few weeks later, though they ...