When was the right to vote for women, as per the nineteenth amendment, ratified in the U.S.A?

The 19th amendment legally guarantees American women the right to vote. Achieving this milestone required a lengthy and difficult struggle—victory took decades of agitation and protest. Beginning in the mid-19th century, several generations of woman suffrage supporters lectured, wrote, marched, lobbied, and practiced civil disobedience to achieve what many Americans considered a radical change of the Constitution. Few early supporters lived to see final victory in 1920.

Beginning in the 1800s, women organized, petitioned, and picketed to win the right to vote. Between 1878, when the amendment was first introduced in Congress, and August 18, 1920, when it was ratified, champions of voting rights for women worked tirelessly, but strategies for achieving their goal varied. Some pursued a strategy of passing suffrage acts in each state—nine western states adopted woman suffrage legislation by 1912. Others challenged male-only voting laws in the courts. Some suffragists used more confrontational tactics such as picketing, silent vigils, and hunger strikes.

By 1916, almost all of the major suffrage organizations were united behind the goal of a constitutional amendment. When New York adopted woman suffrage in 1917 and President Wilson changed his position to support an amendment in 1918, the political balance began to shift. On May 21, 1919, the House of Representatives passed the amendment, and 2 weeks later, the Senate followed.