Armed Forces Day is observed in Greece every November 21, coinciding with the religious feast of the Entry of the Most Holy Theotokos into the Temple. This day honors the Hellenic Armed Forces, which include the Hellenic National Defense General Staff, the Hellenic Navy, the Hellenic Army, and the Hellenic Air Force, all dedicated to protecting Greece's unity and peace. The celebration begins with the raising of the Hellenic flag on the Holy Rock of the Acropolis, followed by a doxology at the Church of Saint Dionysius the Areopagite. Soldiers and officials also lay wreaths at the Tomb of the Unknown Soldier. Greece's armed forces participate in peacekeeping operations as a NATO member and follow a system of compulsory conscription for men over 19, while women may serve voluntarily.