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In page Nineteenth Amendment to the United States Constitution:

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On August 18, 1920, Tennessee narrowly approved the Nineteenth Amendment, with 50 of 99 members of the Tennessee House of Representatives voting yes.^[8]^[9] Upon signing the ratification certificate, the Governor of Tennessee sent it by registered mail to the U.S. Secretary of State Bainbridge Colby, whose office received it at 4:00 a.m. on August 26, 1920. Once certified as correct, Colby signed the Proclamation of the Women's Suffrage Amendment to the U.S. Constitution in the presence of his secretary only, making the Nineteenth Amendment officially law as of that date.^[10] This provided the final ratification necessary to add the amendment to the Constitution,^[11] making the United States the twenty-seventh country in the world to give women the right to vote.^[12]