The public laws enacted between 1981 and 1994 designating a week or a month in March as "Women's History Week" or "Women's History Month" can be found in the United States Statutes at Large, which is available online and at many Federal depository libraries. The specific citations are as follows:

The19th Amendment granted women the right to vote in Federal elections in 1920.

The National Archives website has a 19th Amendment page that includes a copy of House Joint Resolution 1, proposing this amendment to the Constitution.