President Woodrow Wilson signs an act of Congress establishing the Grand Canyon National Park.

Thomas Woodrow Wilson was the 28th president of the United States, serving from 1913 to 1921. He was the only Democrat to serve as president during the Progressive Era when Republicans dominated the presidency and legislative branches. As president, Wilson changed the nation's economic policies and led the United States into World War I. He was the leading architect of the League of Nations, and his stance on foreign policy came to be known as Wilsonianism.

Grand Canyon National Park is a national park of the United States located in northwestern Arizona, the 15th site to have been named as a national park. The park's central feature is the Grand Canyon, a gorge of the Colorado River, which is often considered one of the Wonders of the World. The park, which covers 1,217,262 acres of unincorporated area in Coconino and Mohave counties, received more than 4.9 million recreational visitors in 2024. The Grand Canyon was designated a World Heritage Site by UNESCO in 1979. The park celebrated its 100th anniversary on February 26, 2019.

February 26 is the 57th day of the year in the Gregorian calendar; 308 days remain until the end of the year.