As the nation’s trailblazer of the conservation movement during the Industrial Age, Theodore Roosevelt linked and compared the lives of the American people with the health and existence of our American forests. Arbor Day officially began on April 16, 1872. This year’s 147th Arbor Day is a descendent of the original. In North Dakota, it’s the first Friday in May. In 1907, Roosevelt extolled Arbor Day, with a message for the nation’s school children.