1990
Events
May
- May 30: A liver transplant is performed for the first time in Greece.
June
- June 2: AEK defeat Olympiakos 3-2 to win the first Greek League Cup.
- June 29: Maria Christoforidou wins 3 gold medals at the European Weightlifting Championships in Tenerife.
September
- September 9: Greek-American Pete Sampras wins his first Grand Slam title after defeating Andre Agassi at the US Open.
October
- October 14: Antonis Tritsis defeats actress-activist Melina Mercouri and is elected Mayor of Athens. Tritsis received 50.15% of the vote against Mercouri's 45.94%.
Deaths
August
- August 29: Andreas Varikas, manager of Panionios BC dies aged 45. Panionios hold a basketball tournament every year in his honor.
October
- October 21: Tom Carvel, Greek-American businessman
December
- December 6: Pavlos Sidiropoulos, rock musician.