- 1068: Widowed Byzantine Empress Eudocia married Romanus who became the Emperor best known for losing the Battle of Manzikert.
- 1822: During the Greek War of Independence, the First National Council met and decided upon a constitution. The colours of the Greek flag were to be blue and white.
- 1965: OTE began offering automated services to subscribers; weather and on duty hospital information
- 1981: Greece officially became the 10th member of the European Union.
- 1987: Prices of goods increased as a result of Value Added Taxation (VAT) that went into effect.
- 1994: Greece assumed the Presidency of the European Union.
- 2002: The euro replaced the drachma as the currency of Greece.
- Births: Mordechai Frizis, World War II military hero (1893), Nikiforos Vrettakos, poet (1912), Ellie Lambeti, actress (1926), Panagiotis Giannakis, basketball player and coach (1959), Efthimios Rentzias, basketball player (1976)
- Deaths: Saint Basil (379), Maximus V, Patriarch of Constantinople (1972)
Recent days: December 31 - December 30
- 1910: By law, Sunday was officially designated as a day off for workers in Greece.
- 1913: The Turkish garrison at Chios surrendered to the Greek forces.
- 1930: Greek Minister of Education, Georgios Papandreou, established Modern Greek as a compulsory subject in Greek schools.
- 1958: Greek-American diva Maria Callas left the set after the first act of "Norma", causing a stir in the audience which included the President of Italy.
- Births: Jim Londos, Greek-American Professional Wrestler (1897)
- Deaths: Evangelos Averoff, politician (1990).
Recent days: January 1 - December 31
- 1850: The British imposed a blockade on Greece during the Pacifico incident.
- 1914: The Great Powers recognised Greek sovereignty over the newly-liberated Aegean islands except for Imvros and Tenedos which were to remain under Turkish rule.
- 1945: General Nikolaos Plastiras formed a government in the midst of the post-World War II crisis. His greatest achievement was the Varkiza Agreement.
- 1956: Constantine Karamanlis established the National Radical Union (Ethnike Rizospastike Enosis) political party.
- 1980: The 5-day work week was established for the public sector in Greece.
- Births: Alexandros Diomedes, economist, politician and Prime Minister (1875), Evgenios Spatharis, master of the shadow theatre (Karagiozis) (1924), Nikos Alefantos, football player and coach (1939), Angelos Basinas, Panathinaikos footballer (1976).
- Deaths: Dimitrios Ypsilantis, revolutionary (1832), Alexandros Papadiamantis, writer (1911), Georgios Drosinis, writer, poet (1951).
Recent days: January 2 - January 1
- 1887: Charilaos Trikoupis won the national elections in Greece.
- 1924: Eleftherios Venizelos returned to Athens after 38 months of exile.
- 1930: The Agrarian Bank of Greece commenced operations under Konstantinos Gontikas.
- 1941: Swimmer Georgios Ivanof of Iraklis Salonica, was executed during the German occupation. To honor his memory, the club named its basketball court Ivanofio (Ιβανόφειο) after him.
- 1956: Newly-appointed PM, Constantine Karamanlis, formed a new party called the National Radical Union (ERE).
- Births: Kostas Frantzeskos, footballer (1969)
- Deaths: Nikolaos Gyzis, painter (1901), Spiros Markezinis, economist, politician and historian (2000)
Recent days: January 3 - January 2
- 1825: Greek War of Independence General, Theodoros Kolokotronis, was put on trial by the revolutionary government.
- 1900: The city of Piraeus got electric lighting.
- 1913: During the First Balkan War, the Greek Navy engaged the Ottomans at the Battle of Lemnos.
- 1941: A Greek Army football team played against an English one (4-2) at Leoforos. Two months later, Panathinaikos faced a team of English aviators (6-2). The English took these initiatives aiming to reinforce the ties with the Greek people.
- 1964: Patriarch Athenagoras met Pope Paul VI on the Mount of Olives. It marked the first time the leaders of the Eastern Orthodox Church and the Roman Catholic Church have met since the Council of Florence in the 15th Century.
- Births: Dimitrios Gounaris, politician (1867); Pantelis Zervos, actor (1908); Sakis Rouvas, singer (1972).
Recent days: January 4 - January 3
- 1449: Constantine Palaeologus was crowned Byzantine emperor in Mystras.
- 1828: Ioannis Kapodistrias arrived in Nafplion; the British frigate "Warspite", at his disposal, carried him to Greece.
- 1919: The Labor Socialist Party of Greece (which later became the Communist Party of Greece) held its first open meeting in Athens.
- 1933: An earthquake rocked Volos causing material damage.
- 1950: Greek Prime Minister Alexandros Diomedes resigned amid a scandal involving members of his government.
- Births: Heinrich Schliemann, archaeologist (1822)
- Deaths: Anna Mantzourani, actress (1991)
Recent days: January 5 - January 4
- 1837: The modern city of Sparta was re-established in the same location as the ancient city.
- 1919: The first Greek units landed in Odessa, Russia, as part of the Ukraine Expedition, in the Allies' effort to stem the tide of Bolshevism.
- 1931: The mutilated corpse of builder Dimitrios Athanasopoulos was found. This, one of the most heinous crimes in Greek annals, was later discovered to be the work of Athanasopoulos' wife and his mother-in-law.
- Births: Yiannis Papaioannou, composer, music teacher (1910), Tassos Papadopoulos, President of Cyprus (1934).
- Deaths: Emmanuel Roidis, writer (1904), Napoleon Lapathiotis, poet (1944), Leon Karapanagiotis, reporter, newspaper manager (Ta Nea) (2006)
Recent days: January 6 - January 5
- 1854: While the Crimean War was going on, Greeks in Epirus revolted against Turkish rule.
- 1977: Greek police confiscated 11 tons of hashish in Corinthia. Composer Vasilis Tsitsanis created a hit-song on the subject: "The boat from Persia".
- 1992: Nikos Galis was voted 6th best all-time European basketball player by readers of FIBA Basketball Magazine. Giorgos Kolokithas ranked 46th.
- Births: Yiannis Christou, classical composer (1926), Spyros Livathinos, football player, coach and scout (1955)
- Deaths: Christoforos Rangos, footballer (1950), Yiannis Christou, classical composer (1970)
Recent days: January 7 - January 6
- 1938: Crown Prince Paul of Greece married Princess Frederika in Athens.
- 1948: The Hellenic Parliament passed Law 518 annexing the Dodecanese islands.
- 1965: The Greek government officially announced that 4,000 Greeks were forced to leave Istanbul during 1964 - the year of the Cyprus crisis.
- 1979: Greek television began broadcasting in color using the French system SECAM. It was later replaced by the German PAL
- Births: Michalis Violaris, popular singer (1944)
- Deaths: Samuel Gridley Howe, philhellene (1876), Dimitrios Bitsios, diplomat, Foreign Minister (1984)
Recent days: January 8 - January 7
- 976: Basil II became emperor at age 18. History will come to know him as the "Bulgar-slayer".
- 1927: Clashes broke out in Athens between followers of the Julian calendar and followers of the Gregorian calendar.
- 1941: The Greek First Division liberated Kleisoura.
- 1957: EOKA fighter Fotis Pittas was arrested by the British.
- 1983: Greece devalued the drachma by 15.5%
- Births: Jenny Vanou, popular Elafro singer (1945)
- Deaths: John I Tzimisces, Byzantine emperor (976), Dimitrios Voulgaris, politician and Prime Minister of Greece (1878), Dimitris Myrat, stage actor (1991).
Recent days: January 9 - January 8
- 1801: Ali Pasha ordered the execution by drowning of Kyra-Frosini.
- 1930: Kostis Palamas became President of the Athens Academy.
- 1944: Allied airplanes bombarded the harbour of Piraeus.
- 1979: Yiangos Pesmazoglou left the Centrist Democratic Union to form the Democratic Socialist Party (KODISO)
- Births: Theodosius I, Byzantine emperor (347), Georgios Iakovidis, painter (1853), Nikos Kavvadias, writer (1910)
- Deaths: Byzantine Emperor Stauracius (812), Constantine IX, Byzantine emperor nicknamed "Monomachos" (1055), King Constantine I exiled monarch of Greece (1923), Grigorios Xenopoulos, writer (1951).
Recent days: January 10 - January 9
- 1827: Asimo Lidoriki-Goura, widow of Yiannis Gouras and commander of the Acropolis defence, was killed when a Turkish bomb brought down the roof of the Erechtheum.
- 1931: Tobacco factory workers protested in Piraeus because women were hired at their factory.
- 1940: The Metaxas government considered a "statement of repent" to be sufficient for the release of any communist held in prison.
- 1970: A Greek military airplane crashed on Mount Cithaeron. 23 dead.
- Births: Spiros Loues, 1896 Olympic Marathon winner (1872), Jenny Karezi, actress (1936)
- Deaths: Ioannis Varvakis, National Benefactor (1825), Georgios Theotokis, politician, Prime Minister (1916)
Recent days: January 11 - January 10
- 532: The Nika riots broke out in Constantinople.
- 1801: The flag of the "Independent State of the Ionian Islands" was raised in Corfu.
- 1941: Anton Christoforidis defeated Melio Bettina, in Cleveland, Ohio, by unanimous decision to win the National Boxing Association light heavyweight title.
- 1955: The sailboat "Agios Georgios" transported weapons and ammunition from mainland Greece to Paphos, Cyprus in preparation for the EOKA struggle.
- 1963: A mudslide killed 13 persons in Mikro Chorio, Evritania prefecture.
- 1974: Metropolitan Serafim of Ioannina was elected Archbishop of Athens and all Greece.
- Births: Kostis Palamas, poet (1859), Jacek Gmoch, football coach (1939), Takis Lemonis, football player and coach (1960)
- Deaths: Queen Sophie of Greece (1932), Dimitris Semsis, musician (1950)
Recent days: January 12 - January 11
- 1943: Major Ioannis Tsigantes, leader of the resistance movement Midas 614, was slain during a battle with Italian carabinieri.
- 1959: Omada, the weekly small size sports newspaper, was first published by Lambrakis Press S.A.
- 2005: Alexandros Lykourezos was elected President of the EPAE
- Births: Dimitrios Tsafendas, assassin (1918), Maria Farantouri, singer (1947), Antonios Nikopolidis, football player (1971).
- Deaths: Athanasios Kanakaris, political figure of the War of Independence (1824), Kostas Rigopoulos, actor (2001)
Recent days: January 13 - January 12
- 1823: Georgios Karaiskakis defeated the Turks at the Battle of Agios Vlassis.
- 1939: A committee was established to organise the transfer of the remains of Andreas Kalvos from England to Greece
- 1950: The Church of Cyprus organised a referendum as to the future status of the island colony. 97% of all participants voted for Enosis with Greece.
- 2006: A new political party, ASPIDA, was officially formed in Greece with the sole purpose of representing the Roma or Gypsy community.
- Births: Aristotle Onassis, shipping tycoon (1906), Nikos Sarganis, footballer (1954), Christos Kostis, footballer (1972)
Recent days: January 14 - January 13
- 1824: Petrobey Mavromichalis formed a rival government to that of Georgios Kountouriotis, in Tripolis.
- 1992: Andreas Papandreou was acquitted by a 7-6 vote of a Special Court of the Bank of Crete scandal. His cohorts, Dimitris Tsovolas and Giorgos Petsos, were found guilty.
- 1996: PM Andreas Papandreou retired from office due to poor health.
- Births: Archbishop of Athens and all Greece Christodoulos (1939).
- Deaths: Dimitris Horn, actor (1998).
Recent days: January 15 - January 14
- 395: Upon the death of Theodosius I, the Roman Empire was permanently split into West and East. Some historians consider this event the beginning of the Byzantine Empire.
- 1822: Ali Pasha was beheaded by the Turks on a small island of Lake Pamvotis. The severed head was sent to Sultan Mahmud II in Istanbul.
- 1827: Georgios Karaiskakis defeated the Turkish army at Distomo possibly saving the Greek Revolution from being extinguished in Rumeli.
- Births: Nikos Nioplias, football player and coach (1965).
- Deaths: Theodosius I, Byzantine emperor (395), Ali Pasha (1822), Petrobey Mavromichalis, Maniote leader during the Greek Revolution (1848), Antonis Travlantonis, author (1943).
Recent days: January 16 - January 15
- 532: The Nika riots were put down by General Belisarius. 30,000 rioters were slain in Constantinople.
- 1913: The Naval Battle of Lemnos ended in Greek victory.
- 1957 - EOKA guerilla fighter, Markos Drakos, was ambushed and slain by the British at Solea, Cyprus.
- 1996 - Costas Simitis became leader of PASOK and Prime Minister of Greece
- Births: Yiannis Papaioannou, rebetika songwriter (1913), Vassilis Tsitsanis, composer (1915).
- Deaths: Leo I, Byzantine emperor (474), Vassilis Tsitsanis (1984), Paul Tsongas, Greek-American politician (1997).
Recent days: January 17 - January 16
- 1943: The "RHS Vasilissa Olga" sank the Italian ship Stromboli off the coast of Tunisia.
- 1947: The "S.S. Chimara" sank in the Euboic Sea. Casualties numbered 400 dead, among them 200 policemen and 36 political prisoners.
- 1949: Communist forces entered Karpenisi during the Greek Civil War. They held it for three days.
- Births: Pulcheria, Byzantine empress (399); Aris San, Greek-Israeli singer (1940); Giorgos Hadjinasios, composer (1942)
Recent days: January 18 - January 17
- 1930: The Greek National Football Team recorded their first ever win against Yugoslavia 2-1 (Giorgos Andrianopoulos, Dinos Andrianopoulos)
- 1962: The official results of the 1961 Census were released - the population of Greece numbered 8,388,553 people.
- 1982: The first Greek test-tube baby - Christina Iordanidou - was born.
- Deaths: Yiannis Skarimbas, writer (1984), Dora Stratou, choreographer (1988), Sir John Harding, former military governor of Cyprus (1989)
Recent days: January 19 - January 18
- 1878: 24,000 Greek troops, under Gen. Skarlatos Soutsos, invaded Thessaly to aid locals who rebelled against Ottoman yoke.
- 1897: 1,500 Greek troops, under Timoleon Vassos, landed in Crete to aid local rebels who sought union with Greece.
- 1988: The Revolutionary Organization 17 November unsuccessfully attempted to assassinate US official George Karos.
- Births: Telly Savalas, Greek-American actor (1924), Phaedon Georgitsis, actor (1939), Dimitris Poulikakos, actor (1943)
- Deaths: Col. Konstantinos Davakis, WWII hero (1943)
Recent days: January 20 - January 19
- 1830: Greece was recognised as an independent country by the London Protocol.
- 1923: A decision to establish an agrarian bank to aid the farmers was made by the Greek government.
- 1965: Aliki Vougiouklaki married Dimitris Papamichail.
- Births: Lord Byron, poet, philhellene (1788), Mimis Domazos, footballer (1942), Nikos Anastopoulos, footballer (1958)
- Deaths: Pantelis Zervos, actor (1982), Telly Savalas, Greek-American actor (1994).
Recent days: January 21 - January 20
- 1923: The Greek Government published the law that adopted the Gregorian Calendar.
- 1996: Greece submitted her candidacy as host country of the 2004 Olympics.
- 2008: PM Costas Karamanlis visited Turkey marking the first official visit by a Greek PM to that country since 1959.
- Births: Kyriakos Matsis, EOKA fighter (1926), Fiona Tzavara, singer (1978)
- Deaths: Alexander Onassis in an aircrash (1973)
Recent days: January 22 - January 21
- 1913: In first ever naval aviation combat mission, First Lieutenant Mihail Moutousis and Ensign Aristides Moraitinis bombarded the Turkish Navy in the Bay of Nagara.
- 1963: Crown Prince Constantine of Greece and Princess Anna Maria of Denmark got engaged.
- 1994: The Revolutionary Organization 17 November assassinated Michalis Vranopoulos, former governor of the National Bank.
- 2001: Greek President Kostis Stephanopoulos visited the Vatican and met Pope John Paul II.
- Births: Argyris Kambouris, basketball player (1962)
- Deaths: Elias Iliou, Greek politician, leader of the United Democratic Left (1985); Demis Roussos, singer (2015)
Recent days: January 23 - January 22
- 1947: Dimitrios Maximos formed an all-inclusive government with political opponents Sophoklis Venizelos and Konstantinos Tsaldaris serving as his two vice-presidents
- 1962: Under pressure, Iakovos III resigned his post as Archbishop of Athens and all Greece.
- 2015: The radical left party SYRIZA won elections, making Alexis Tsipras the country's youngest prime minister in 150 years.
- Births: Giorgos Zambetas, Laiko composer and singer (1925), Elias Papakyriakou, EOKA fighter (1938), Stathis Tavlaridis, footballer (1980)
- Deaths: Saint Gregory Nazianzenus (389)
Recent days: January 24 - January 23
- 1699: Through the Treaty of Karlowitz, Morea passed from the Ottoman Empire to Venice.
- 1944: 43 Greeks were executed outside Kozani by the occupation forces.
- 1989: Two masked men robbed the Post Office of Chania, Crete of some 47,000,000 drachmas.
- 1995: Greek Foreign Minister, Karolos Papoulias, canceled his visit to Auschwitz for the 50th anniversary of the camp's liberation, on account of the Polish government's raising of the flag of FYROM with the sunburst of Vergina at the camp.
- Deaths: Achilleas Paraschos, poet (1895)
Recent days: January 25 - January 24
- 1944:Athanassios Sembos made the first attempt to set up a journalists' union after the war ended. The second attempt took place on May 17, 1947. The union assumed legal existence after 1952.
- 1990: An Athens Appellate Court acquitted Police Officer Athanasios Melistas in the 1985 shooting of 15-year old student Kaltezas.
- 2005: During a thunderstorm, a lighting bolt hit a support cable of the Rio-Antirrio Bridge. The fire was placed under control immediately, but questions arose over the security of the bridge.
- Births: Alexandros Kotzias, author (1925)
- Deaths: Georgios Grivas-Digenis, commander of EOKA (1974), Philopemen Finos, Film producer ( 1977), Stratis Tsirkas, writer (1980)
Recent days: January 26 - January 25
- 1826: Andreas Miaoulis defeated the Turco-Egyptian fleet at the Battle of Araxos and supplied the besieged at Messolonghi.
- 1974: Archbishop Makarios III declared a 3-day mourning period, throughout Cyprus, over the death of his political opponent Georgios Grivas.
- Deaths: Anastasios Metaxas, architect, Olympic athlete (1937), Christodoulos, Archbishop of Athens and all Greece (2008).
Recent days: January 27 - January 26
- 1983: Greece reformed family law giving women equal rights.
- 2000: Marina Varsamidou smashed Christina Panagou's 13 year old 400m indoors record with 53.54
- 2006: Cypriot Marcos Baghdatis played against Roger Federer in the mens' final of the Australian Open. Baghdatis took the first set but eventually lost 3-1 sets.
- Births: Aleka Kanellidou, singer (1945), Athina Roussel Onassis, heiress to the Aristotle Onassis fortune (1985).
- Deaths: Ioannis Metaxas, Greek PM during World War II (1941).
Recent days: January 28 - January 27
- 330 BC: Alexander the Great led a united Greek army into Persepolis.
- 1925: Patriarch Constantine VI of Constantinople was deported by the Turkish government.
- 1929: Greek women acquired the right to vote.
- 1995: Greek archaeologist, Lena Souvlatzi, announced in Egypt that she has discovered the tomb of Alexander the Great.
- Births: Giorgos S. Georgiadis, footballer (1971); Christos Tzolis, footballer (2002).
- Deaths: Orestes Makris (1975), actor; Christos Vakalopoulos (1993), director; Nikos Kourkoulos (2007), actor
Recent days: January 29 - January 28
- 1934: Jim Londos beat Joe Savoldi in a one-fall match in Chicago. The crowd of 20.000 was one of the largest to watch a wrestling match
- 1969: The Central Committee of the Communist Party of Greece purged Antonis Brillakis and Babis Drakopoulos.
- 1996: Greece and Turkey nearly went to war over the uninhabited Imia islands.
- Births: Traianos Dellas, footballer (1976), Elena Paparizou, singer (1982)
- Deaths: Alexander Ypsilantis, revolutionary (1828), Georgios Kondilis, general, politician (1936), Kostas Moundakis, Cretan musician (1991)
Recent days: January 30 - January 29