Question: when did pomp and circumstance become the graduation song

title: Pomp and Circumstance Marches
text: In the United States , the Trio section `` Land of Hope and Glory '' of March No. 1 is often known simply as `` Pomp and Circumstance '' or as `` The Graduation March '' and is played as the processional tune at virtually all high school and some college graduation ceremonies . It was first played at such a ceremony on 28 June 1905 , at Yale University , where the Professor of Music Samuel Sanford had invited his friend Elgar to attend commencement and receive an honorary doctorate of music . Elgar accepted , and Sanford made certain he was the star of the proceedings , engaging the New Haven Symphony Orchestra , the College Choir , the Glee Club , the music faculty members , and New York musicians to perform two parts from Elgar 's oratorio The Light of Life and , as the graduates and officials marched out , `` Pomp and Circumstance '' March No . 1 . Elgar repaid the compliment by dedicating his Introduction and Allegro to Sanford later that year . The tune soon became de rigueur at American graduations , used primarily as a processional at the opening of the ceremony . Description 

Answer: answer: Pomp and Circumstance Marches was first played at such a ceremony on 28 June 1905 , at Yale University , where the Professor of Music Samuel Sanford had invited his friend Elgar to attend commencement and receive an honorary doctorate of music . The tune soon became de rigueur at American graduations , used primarily as a processional at the opening of the ceremony .