Although the Navajo Reservation near the Four Corners region does not have an official time zone, it has chosen to adhere to daylight-saving time like the rest of the country. (with the exception of the rest of Arizona and the state of Hawaii). The reservation area is a large area (over 27,400 square miles) and because parts of it reach into neighboring states that do observe daylight saving time, the decision was made in 1968 to stick to the time change.
What is even more interesting is that there are two different Native American reservations situated inside the Navajo Nation; The Hopi reservation is surrounded on all sides by the Navajo reservation, and they do not follow daylight-saving time.
This means if you were to drive from one side of the Navajo reservation, through the Hopi reservation, and back into Navajo land within a 100-mile span, you would change time zones several times!
The Navajo Nation is a beautiful and sacred place where you can find the world-famous Monument Valley and the looming mountain formation known as Shiprock. There are also many charming small towns full of hospitable people.