15 October 2026: This day in history

1581: The first ballet “Ballet Comique de la Reine,” commissioned by Catherine de Medici, is staged in Paris

Pope Gregory XIII with the calendar that was to make his nameGregory Conquers Julius Caesar

1582: Gregorian calendar is introduced in Spain, Portugal, and the Papal States after skipping 10 days from October 4 to sync the calendar to the solar year and compensate for the drift that has occurred due to the Julian calendar having too many leap days

1815: Napoleon Bonaparte arrives on the island of Saint Helena to begin his exile

1969: Millions nationwide protest against the Vietnam War on Moratorium Day in the US

1993: Nelson Mandela and South African President F. W. de Klerk are awarded the Nobel Peace Prize

Source: Onthisday.com