Mother's Day for celebrating mothers and showering them with gifts and treats.

National Golf Day is celebrated annually on May 10th. It's a day to celebrate the sport of golf.

Cinco De Mayo is celebrated every year on May 5  to commemorate the victory of the Mexicans over the French in the Battle of Puebla during the Franco-Mexican War in 1862. The term 'Cinco De Mayo' is a Spanish phrase that translates to "the fifth of May".

All Navajo Transit System Offices and Transportation Facilities will be closed in observance of this Holiday.