On October 13, 1925, Margaret Thatcher, the future Prime Minister of the United Kingdom, was born in Grantham, England. She would go on to become the longest-serving British prime minister of the 20th century and the first woman to hold the office.

Margaret Hilda Roberts, as she was known before her marriage, was born above her father's grocery store. Her father, Alfred Roberts, was a local politician and businessman who instilled in her the values of hard work, self-reliance, and public service.

Thatcher attended Oxford University, where she studied chemistry and became involved in politics. She was elected President of the Oxford University Conservative Association in 1946, becoming the first woman to hold the position.

After graduating, Thatcher worked as a research chemist and later studied law. She married Denis Thatcher in 1951 and gave birth to twins, Carol and Mark, in 1953.

Thatcher's political career began in 1959 when she was elected as a Member of Parliament for Finchley. She quickly rose through the ranks of the Conservative Party, serving as Education Secretary from 1970 to 1974.

In 1975, Thatcher challenged Edward Heath for the leadership of the Conservative Party and won, becoming the first woman to lead a major political party in the United Kingdom. She then led the Conservatives to victory in the 1979 general election, becoming Prime Minister.

As Prime Minister, Thatcher implemented a series of economic and social reforms that came to be known as "Thatcherism." These included reducing the power of trade unions, privatizing state-owned industries, and cutting taxes. Her tough stance on issues such as the Falklands War and the miners' strike made her a divisive figure, but also earned her the nickname "The Iron Lady."

Thatcher resigned as Prime Minister in 1990 and was appointed to the House of Lords in 1992. She remained active in politics and public life until her death in 2013 at the age of 87.

The birth of Margaret Thatcher on October 13, 1925, set in motion a remarkable life and career that would shape British politics and society for decades to come. Whether loved or loathed, there is no denying the significant impact she had as the United Kingdom's first female Prime Minister.