27OCTOBER

ON THIS DAY

What happened on October 27?

October 27 links New York’s first subway line with a change of government in Pakistan, two new United Nations members and the transformation of London’s financial markets.

4 researched moments · 4 themes · reviewed September 2026

4 moments shown

1904

New York City’s first subway line opened

The Interborough Rapid Transit Company opened the city’s first underground rapid-transit route to the public.

1958

Ayub Khan assumed Pakistan’s presidency

General Muhammad Ayub Khan removed President Iskander Mirza and consolidated military rule in Pakistan.

1961

Mauritania and Mongolia joined the United Nations

The General Assembly admitted Mauritania and the Mongolian People’s Republic as member states.

1986

London’s financial Big Bang reforms took effect

A package of market reforms ended fixed commissions and changed ownership and trading rules on the London Stock Exchange.

A LIVING COLLECTION

This date can keep growing.

History is wider than any first selection. We can add well-sourced events, people and perspectives while keeping every entry in chronological order.

Suggest a correction or addition

A LITTLE SPACE FOR WHAT MATTERS

Life has a lot of dates. Give yours a home.

Your people, your plans and the things you want to remember.

Request your invite