January 1, 1975
Constitution of Greece — fundamental law of Greece, in effect since 1974
1975 Cricket World Cup — 1975 World Cup in England
Section of the Big Island of Hawaii
1975–76 European Cup — 21st season of the UEFA club football tournament
EuroBasket 1975 — 1975 edition of the FIBA EuroBasket
1975 Formula One season — sports season
1975 Copa América — 1975 edition of the Copa América association football competition
Eurovision Song Contest 1975 — 20th edition of the Eurovision Song Contest
1975–76 UEFA Cup — 5th season of Europe's secondary club football tournament organised by UEFA
1975 World Women's Handball Championship — 1975 edition of the World Women's Handball Championship