Navajo National Monument's visitor center is open year round but closed on Thanksgiving (November 22), 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 11, 2018 to November 04, 2018 the Navajo Nation along with Navajo National Monument observes Mountain Daylight Saving Time (MDST) which is one hour ahead of Mountain Standard Time (MST).
Call: (928)672-2700 or 2727 for more information.