Navajo National Monument's visitor center is open year round but closed on Thanksgiving (November 28), Christmas (December 25), and New Year's Day (January 1).
Summer hours: From Memorial Day (last week of May) to Labor Day (first week of September), the visitor center is open 8 A.M. to 5:30 P.M.
Winter hours: From October to May, the visitor center is open 9 A.M to 5 P.M.
Time Change: From March 10, 2019 to November 03, 2019 the Navajo Nation along with Navajo National Monument observes Mountain Daylight Savings Time (MDST) which is one hour ahead of Mountain Standard Time (MST) and the state of Arizona.
Call: (928)672-2700 for more information.