What was the name of the 1992 European currency crisis that forced Britain to leave the ERM?

The 1992 European currency crisis that forced Britain to leave the ERM was called Black Wednesday.

Black Wednesday occurred on September 16, 1992, when the British government withdrew the pound sterling from the European Exchange Rate Mechanism. The ERM required participating currencies to remain within agreed bands against one another, and Britain had joined in 1990.

Speculators sold pounds because they believed the currency could not remain within its ERM range without either a major policy change or devaluation. The government raised interest rates and announced further emergency measures, but those steps failed to restore confidence. Britain ultimately suspended the pound’s ERM membership.

The event did not represent a conventional stock-market crash, but it was a major financial-market shock involving currency, interest-rate, and political turmoil. It is sometimes confused with Black Monday, the 1987 global stock-market collapse, because both names use the word “Black.”