The park is open year round except Christmas, December 25.
Petrified Forest National Park is open at different hours during the year. Hour Changes (times are Mountain Standard year round-this area does not observe Daylight Saving):
Park Road Hours
January 1 to March 4 8am to 5pm
March 5 to May 13 7am to 7pm
May 14 to August 5 7am to 7:30pm
August 6 to September 2 7am to 7pm
September 3 to October 28 7am to 6pm
October 29 to December 31 8am to 5pm
Visitor Centers Hours
Painted Desert Visitor Center and Rainbow Forest Museum & Visitor Center
8am-5pm year round, with extended hours spring through fall
Painted Desert Inn National Historic Landmark Hours
Daily 9am to 4pm
Note: Arizona does not observe Daylight Saving Time, remaining on Mountain Standard Time year-round. For example, in the summer months, during Daylight Saving Time, the time in Arizona and California is the same, with New Mexico and the Navajo Reservation one hour ahead.