Happy 90th birthday, 19th Amendment.

Today in 1920, after the mother of Tennessee legislator Harry Burn told him to "be a good boy and vote for suffrage," Tennessee became the 36th state to ratify the 19th Amendment to the Constitution and thus gave US women the right to vote.

To watch "Sufferin' till Suffrage" from Schoolhouse Rock, go here.

About the image: Suffrage leaders Carrie Chapman Catt, right, and Mary Garrett Hay, center, vote in their first election in New York.  Evening Public Ledger, Philadelphia, November 4, 1920.