What was the name of the 1992 crisis when Britain left the European Exchange Rate Mechanism?

The 1992 crisis when Britain left the European Exchange Rate Mechanism was called Black Wednesday.

Black Wednesday occurred on 16 September 1992. The British government tried to keep the pound sterling within the ERM’s permitted exchange-rate band, but heavy selling pressured the currency. After interest-rate increases and other measures failed to restore confidence, Britain suspended the pound’s ERM membership.

The episode was a currency crisis rather than a single-day stock-market crash, but it is widely included in histories of major financial market shocks. George Soros became famous for profiting from a large short position against sterling, although many investors traded against the pound. A common mistake is to call the event a stock-market crash; its central market was foreign exchange, and the decisive asset was the pound.