The rest of the country, including parts of the Navajo Nation within Arizona, observes daylight saving time. On Sunday at 2 a.m., clocks moved forward one hour to 3 a.m., a change that will remain ...

It's that time of year again, so here's a little primer on daylight-saving time, and how Arizona, by not observing the time shift, fluctuates from its normal Mountain Time Zone to California's ...

They are increasingly used to track the effects of climate change over time. Biorepositories are also concerned with animals. The Natural History Collections at Arizona State University include ...

Arizona, Florida, Idaho, Indiana, Kansas, Kentucky, Nebraska, Nevada, North Dakota, Oregon, South Dakota, Tennessee and Texas. Here's a look at where the time zone changes and which counties are ...

Arizona's independence from this annual time change can cause a lot of confusion for residents and visitors alike. It means the state is in the same time zone as Denver from November to March ...