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.

Happy birthday, 19th amendment.

The ratification of the 19th amendment to the Constitution—giving American women the right to vote—occurred today in 1920 (thanks to Tennessee state representative Harry Burn, whose mother told him to "be a good boy and vote for suffrage").

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

About the photo: Alice Paul, author of the Equal Rights Amendment, sews a star onto a suffrage flag (stars were added as states ratified the 19th amendment). Library of Congress, Prints and Photographs Division, reproduction number LC-USZ62-119710.