The day will be marked in Kefalonia with parades and is a bank holiday.
Ohi Day (Anniversary of the No) is celebrated throughout Greece on 28 October each year.
Ohi Day commemorates the rejection by Greek prime minister Ioannis Metaxas of the ultimatum made by Italian dictator Benito Mussolini on 28 October 1940.
This ultimatum, which was presented to Metaxas by the Italian ambassador to Greece, Emanuele Grazzi, shortly after 03:00 am on 28 October 1940, who had just come from a party in the Italian embassy in Athens, demanded Greece allow Axis forces to enter Greek territory and occupy certain unspecified “strategic locations” or otherwise face war.
It was allegedly answered with a single word: όχι (No!).