Arbor Day is April 22. For the 11th year the Arbor Day Foundation has commended Winona State University for engaging students in the spirit of conservation. The Foundation noted that Winona State maintains a tree advisory committee, a campus tree-care plan and budget, and an Arbor Day observance, said Nathan Anderson, campus arboretum director. Only one other campus in the state, the University of Minnesota in the Twin Cities, hold the recognition.