What states don't observe daylight savings time?

Wow! You guys are all over the map on this one, pardon the pun.

Only one state does not, in its entirety, observe, DST: Hawaii.

Most of Arizona does not observe DST, but the large Indian reserve in the northeast does use DST. In summer, when it is 12 noon in Los Angeles, it is also noon in Phoenix, but 1 p.m. on the reserve.

Every part of Indiana observes DST. The entire state started in April 2006. Note that two large corners of IN lie in the Central Time Zone, but they definitely do observe DST (or else, Gary would fall an hour behind Chicago in summer, and it most assuredly does not). Indianapolis is always the same time as here in New York.

Puerto Rico and the Virgin Islands (not states) do not observe DST. In summer, when it is noon in New York, it is also noon in San Juan, but in December Puerto Rico and VI, in the Atlantic Time Zone, are an hour ahead of me.

What States Observe Daylight Savings

The federal law that established "daylight time" in this country does not require any area to observe daylight saving time. But if a state chooses to observe DST, it must follow the starting and ending dates set by the law. From 1986 to 2006 this has been the first Sunday in April to the last Sunday in October, but starting in 2007, it will be observed from the second Sunday in March to the first Sunday in November, adding about a month to daylight saving time. Arizona (with the exception of the Navajo Nation) and Hawaii and the territories of Puerto Rico, Virgin Islands, Guam, and American Samoa are the only places in the U.S. that do not observe DST but instead stay on "standard time" all year long. And if you've spent any time in the sweltering summer sun in those regions you can understand why residents don't need another hour of sunlight. Until April 2005, when Indiana passed a law agreeing to observe daylight saving time, the Hoosier state had its own unique and complex time system. Not only is the state split between two time zones, but until recently, only some parts of the state observed daylight saving time while the majority did not. Under the old system, 77 of the state's 92 counties were in the Eastern Time Zone but did not change to daylight time in April. Instead they remained on standard time all year. That is, except for two counties near Cincinnati, Ohio, and Louisville, Ky., which did use daylight time. But the counties in the northwest corner of the state (near Chicago) and the southwestern tip (near Evansville), which are in the Central Time Zone, used both standard and daylight time. The battle between the old system and DST was contentious and hard-won—bills proposing DST had failed more than two dozen times until finally squeaking through the state legislature in April 2005. As of April 2, 2006, the entire state of Indiana joined 48 other states in observing Daylight Saving Time. But it wasn't quite as simple and straightforward as all that—telling time in Indiana remains something of a bewildering experience: eighteen counties now observed Central Daylight Time and the remaining 74 counties of Indiana observe Eastern Daylight Time.

One state that is missing from all the answers is Hawaii. I lived there from 1994-1997. Unless they changed it, Hawaii doesnt observe daylight savings time.

Arizona

Arizona

As of April 2006 Indiana started observing DST...

Part of Indiana does not change times. There is one other state that I know does this as well, but I can't recall which. Could be Nevada, Utah. It's in that area of the map.

States that use Mountain Time never change their clocks.

Arizona, Colorado, Idaho, Montana, part of Nebraska, New Mexico, part of Oregon, part of South Dakota, part of Texas, Utah and Wyoming

Indiana and Arizona I think