- January 11: Allied airplanes bombard the harbour of Piraeus, destroying much of the city centre and killing 5,500 civilians.
- January 21: Four units of the Hellenic Navy ("Crete", "Themistocles", "Chios" and "Samos") take part in the landing at Anzio.
- January 26: 43 Greeks are executed outside Kozani by the occupation forces.
- February 29: Greek resistance movements EDES, EAM and EKKA sign a cooperation pact at Plaka, Epirus.
- March 10: The Political Committee of National Liberation (the "government of the mountains") is formed at Viniani, Evritania prefecture. Evripidis Bakirtzis is sworn in as Prime Minister.
- April 1: Leftist officers and troops of the Greek 1st Brigade revolt in Alexandria.
- April 3: 30 Greeks, under Lt. Col. Andreas Kalinskis, liberate Greek prisoners held by the Germans in Mytilene. Six Germans are killed in the operation.
- April 4: The village of Drosopigi in Florina prefecture, Macedonia, Greece, is totally destroyed by German occupation troops.
- April 5: 270 Greeks are executed in the village of Kleisoura (Kastoria), by the German occupation forces, in retaliation for the killing of two German soldiers in the area.
- April 5: Hellenic Navy crew members join the revolt in Alexandria.
- April 17: Communist resistance group ELAS attack and annihilate EKKA, a republican resistance group. EKKA leader, Dimitrios Psaros, is captured and executed.
- April 18: Alexandros Svolos replaces Evripidis Bakirtzis as head of the Political Committee of National Liberation (the government of the mountains).
- April 23: The revolt of Greek leftist troops in Alexandria is put down by force.
- April 24: 318 Greeks are killed by German occupation troops in Pyrgos, Kozani prefecture. 180 of them were burned alive.
- April 26: Greek guerrilas and British commandos kidnap Gen. Heinrich Kreipe, commander of the German garrison of Crete.
- May 1: 200 Greek patriots are executed by the Nazis at Kaisariani.
- May 4: The village of Saktouria in Rethymno prefecture, Crete, is totally destroyed by German occupation troops.
- May 4: The village of Margarikari in Heraklio prefecture, Crete, is totally destroyed by German occupation troops.
- May 9: 10 Greeks are hanged by the German occupation forces at Psila Alonia, Achaea prefecture. Several were members of the resistance group EAM.
- May 16: Sixteen inhabitants of the village of Saktouria in Rethymno prefecture, Crete, are executed by German occupation troops.
- May 17: The Greek government-in-exile meets with representatives of the various guerrila movements in Lebanon.
- June 10: German occupation troops execute 218 Greeks in Distomo, Boeotia prefecture.
- June 17: German occupation troops destroy Ypati, Phthiotis prefecture after executing 28 inhabitants.
- August 11: The Greek 3rd mountain brigade lands in Taranto, Italy.
- August 13: German troops destroy the village of Anogia, Crete.
- August 17: German troops execute 148 Greeks in Kokkinia, Piraeus.
- August 21: German troops destroy the village of Damasta, Crete, after executing 30 inhabitants.
- September 5: 50 Greeks are executed at Kesariani by German occupation troops.
- September 8: Lela Karayianni, leader of the "Bouboulina" resistance movement, is executed by the Germans.
- September 14: German forces execute 114 residents of Giannitsa.
- September 15: ELAS guerrilas attack and capture Meligala, Messinia. Atrocities follow with as many as 1,450 dead.
- September 21: The Greek 3rd mountain brigade enters Rimini after defeating its German defenders.
- September 26: EAM/ELAS and EDES agree in Caserta, Italy, to place their men under the command of British Maj. Gen. Ronald Skobie.
- September 27: The Greek 3rd mountain brigade crosses the Rubicon.
- October 7: 300 Greek Jews lead 150 others in a revolt at the Auschwitz concentration camp. Nearly all are killed in the ensuing fight against the German guards.
- October 7: The first British troops land in the Peloponnese.
- October 12: The WWII German occupying forces move out of Athens.
- October 17: The Greek government-in-exile boards the Battleship Georgios Averof for the return trip to Athens.
- October 18: The Greek Government in exile, under Georgios Papandreou, arrives in Piraeus.
- October 20: Joseph Stalin and Sir Winston Churchill partition eastern Europe into "spheres of influence". Greece is marked as 90% under British and only 10% under Soviet influence.
- October 28: German soldiers, while on retreat, sabotage and destroy the bridge of Papadia, and the tunnel and bridge of Brallos.
- October 30: Thessaloniki is liberated from the German World War II occupying forces
- November 3: A 100 billion drachma note is put into circulation - the largest denomination of currency ever issued in Greece.
- November 28: PM Georgios Papandreou calls for the dissolution of all guerrila movements by December 10.
- December 1: Gen. Ronald Scobie issues a proclamation calling for the dissolution of the National Popular Liberation Army (ELAS). His call will go unheeded.
- December 2: Five leftist Ministers of the Papandreou government resign in protest at Gen. Scobie's call for the dissolution of the National Popular Liberation Army (ELAS).
- December 3: Members and supporters of the leftist EAM/ELAS demonstrate in Constitution Square, Athens. Police fire on the demonstrators killing 28 of them.
- December 4: Communist organisation ELAS and nationalist Organisation X battle at Theseum for control of Athens.
- December 21: Three ELAS divisions attack EDES at their stronghold in Epirus.
- December 22: The High Command of EDES orders its forces to retreat to Preveza.
- December 24: Sir Winston Churchill arrives in Athens in an attempt to resolve the political crisis between EAM and the re-instated Greek government of Georgios Papandreou.
- December 27: PM Georgios Papandreou submits his resignation in the midst of the post-World War II December crisis ("Δεκεμβριανά"). Winston Churchill leaves Athens for London.
- December 28: British ships start to evacuate the remnants of Napoleon Zervas' EDES forces off the Greek mainland to the island of Corfu.
- December 30: Epirus comes under the full control of ELAS.
- January 9: Michalis Violaris, popular singer
- January 31: Christodoulos Pasiardis, Defence Minister of Cyprus