September 20 — This Day in Women's History

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This Day in Women's History

A research-grade almanac of firsts and sentinel achievements — indexed against every day of the year.

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September 19 Calendar September 21

This Day

20September

1 indexed achievement across recorded history.

1973

Sports

Wins the 'Battle of the Sexes'

Defeats Bobby Riggs in straight sets before 30,000 spectators in the Houston Astrodome.

Billie Jean King·WTA — Billie Jean King