Albert Einstein was born in Ulm, Germany, on the date that would later become globally celebrated as Pi Day.

Bulgaria's Grand National Assembly adopted the Tarnovo Constitution, establishing the newly autonomous principality as a constitutional monarchy.

British forces accepted the surrender terms effectively ending major Zulu resistance days after the fall of Ulundi, closing a war that had begun with a stunning Zulu victory at Isandlwana.

Thomas Edison tested a carbonized cotton-thread filament bulb in his Menlo Park laboratory that glowed for over 13 hours, a breakthrough toward commercial electric light.