This peaky mountain is the island of Kefalonia

The celebration of the Greek Revolution of 1821 (Greek: Εορτασμός της Ελληνικής Επανάστασης του 1821, Eortasmós tis Ellinikís Epanástasis tou 1821), less commonly known as Independence Day, takes place in Greece, Cyprus and Greek diasporacenters on 25 March every year, coinciding with the Feast of the Annunciation.[1] https://en.m.wikipedia.org/wiki/Celebration_of_the_Greek_Revolution