October 21, 1966
1966 battle in the Vietnam War
Civil unrest in 1966/7 in West Hollywood, California, USA
1966 Asian Games — fifth edition of the Asian Games
Japanese civil conflict over the construction of Narita Airport (1966-present)
1966 European Athletics Championships — 1966 edition of the European Athletics Championships
World Chess Championship 1966 — Game
1966–67 European Cup — 12th season of the UEFA club football tournament
1966 Formula One season — sports season
1966 FIFA World Cup qualification — international football competition
Pleasure cruiser sinking off the Cornish coast in 1966