Ochi Day is a national holiday in Greece celebrated on October 28th each year. It commemorates the rejection of an ultimatum by Italy in 1940, which demanded that Greek forces allow Axis troops to enter the country. The Greek Prime Minister at the time, Ioannis Metaxas, famously responded with "Ochi," meaning "No," leading to Greece's entry into World War II. The day is marked by various celebrations, including parades and ceremonies across the country. It serves as a reminder of Greek resistance and national pride, honoring those who fought against the Axis powers during the war.