May 3 in History
1979 – Margaret Thatcher wins the United Kingdom general election and becomes the first female British Prime Minister
Margaret Hilda Thatcher, Baroness Thatcher (October 1925 – April 2013), the British stateswoman who served as Prime Minister of the United Kingdom from 1979 to 1990 and Leader of the Conservative Party from 1975 to 1990, was the longest-serving British prime minister of the 20th century and the first woman to hold that office. A Soviet journalist dubbed her the “Iron Lady”, a nickname that became associated with her uncompromising politics and leadership style. As prime minister, she implemented policies that became known as Thatcherism.
-Wikipedia