- January 13: Metropolitan Serafim of Ioannina is elected Archbishop of Athens and all Greece.
- January 28: Archbishop Makarios III declares a 3-day mourning period, throughout Cyprus, over the death of his political opponent Georgios Grivas.
- March 3: Olympiakos thrash Fostiras 11-0 in a Greek League match at Karaiskaki Stadium. Nikos Gioutsos and Yves Triantafillos score 3 goals each.
- April 25: Archbishop Makarios III declares EOKA B' to be an illegal organisation.
- April 28: Greece and World Champions Brazil play to a 0-0 draw before 100,000 spectators at Maracana Stadium in Rio de Janeiro.
- May 16: Work starts on the Athens Metro.
- June 4: Archbishop Makarios III announces his intent to decrease the strength of the Cypriot National Guard and replace the Junta-appointed mainland officers.
- July 2: Archbishop Makarios III demands that Greece remove all its Cypriot National Guard officers except for 100 to remain in an advisory and training capacity.
- July 15: The Cyprus National Guard overthrows President Makarios and installs Nikos Sampson in his place.
- July 19: In a speech at the UN, Archbishop Makarios III calls the coup d'etat of July 15 a "foreign invasion" by Greece that "affects all Cypriots, Greeks and Turks".
- July 20: Turkey invades Cyprus.
- July 21: Greek athlete Giorgos Katsanis is killed in a battle near St. Hilarion Castle during the Turkish invasion of Cyprus. His club, Iraklis Thessaloniki will rename their volleyball stadium in his honour.
- July 22: The Security Council of the UN calls for a ceasefire in Cyprus.
- July 22: The Turkish army overruns Kerynia.
- July 23: The military government in Greece collapses and former prime minister Constantine Karamanlis is invited to return.
- July 23: Nikos Sampson, junta-appointed President of Cyprus, resigns and is replaced by Parliament President Glafkos Clerides
- July 24: Thousands of people welcome Constantine Karamanlis arriving from Paris, France at Hellenikon Airport at 2:00 AM. He is sworn in as Prime Minister at 4:15 AM by President Phaedon Gizikis.
- July 30: Foreign ministers from Greece, Turkey and the UK sign a peace agreement to settle the Cyprus crisis.
- August 2: Maroula Lambrou breaks the Greek women's record in the long jump with a jump of 6.62m.
- August 6: Despite the ceasefire in effect, Turkish troops assault and take Lapithos and Karavas.
- August 14: Turkish military launch the second phase ("Attila 2") of their invasion of Cyprus resulting in the occupation of one-third of the island's territory. 200,000 Greeks are displaced from their homes.
- August 15: Turkish troops overrun Ammochostos.
- August 16: Morphou is occupied by Turkish troops, its inhabitants flee.
- August 16: Andreas Papandreou returns to Greece.
- August 16: The military base of ELDYK is assaulted and taken by Turkish forces.
- August 19: US Ambassador, Rodger Davies, and his Cypriot secretary, Antoinette Varnava, are killed in Lefkosia during anti-US riots in the aftermath of the Turkish invasion of Cyprus.
- August 24: Brig. Gen. Dimitrios Ioannidis is relieved of his rank and ousted from the military by decision of the Greek High Command.
- August 28: An investigation is ordered concerning the November 1973 events at the Athens Polytechnic Institute.
- August 30: An unsuccessful attempt is made on the life of Dr. Vasos Lyssaridis, a Cypriot politician.
- September 3: The Panhellenic Socialist Movement (PASOK) is established.
- September 20: Georgios Mavros is elected leader of the Centre Union party.
- September 23: Greeks and Turks exchange POWs in Lefkosia.
- September 25: Communist daily "Rizospastis" ("Radical") reappears on the newstands after an absence of 27 years.
- October 4: The New Democracy Party is founded by Constantine Karamanlis.
- October 23: Former Junta strongmen George Papadopoulos, Stylianos Pattakos and Nikolaos Makarezos are exiled to the island of Kea.
- November 6: Olympiakos humble Anderlecht 3-0 in the 2nd Leg of their European Champions' Cup matchup. Hungarian referee Palotay disallows two other goals by Olympiakos who are thus eliminated.
- December 7: Archbishop Makarios III returns to Cyprus for the first time since the July 15 coup d'etat that overthrew him.
- December 8: In a democratic referendum held, 69.2% of Greek people confirmed the monarchy's abolition.
- December 18: Michail Stasinopoulos is appointed president of Greece after the resignation of Gen. Phaedon Gizikis.
- December 18: Greece break a 40 year-old tradition by defeating Bulgaria 2-1 at Karaiskaki Stadium (Sarafis, Antoniadis)
- December 29: Costas Mourouzis coaches for the 40th, and last, time the National Basketball Team (22 wins – 18 losses) in the game against Yugoslavia (58-71) in Salonica for the Balkan Championship. He will be succeeded by Vangelis Nikitopoulos.
- March 16: Giorgos Anatolakis, footballer
- March 27: George Koumantarakis, Greek-South African footballer.
- October 1: Spyros Marinatos, archaeologist
- October 10: Athina Mary Livanos, heiress, wife to Onassis and Niarchos.