Laotian Civil War battle

1963 Summer Universiade — multi-sport event in Porto Alegre, Brazil

1963 Cannes Film Festival — film festival edition

1963 Mediterranean Games — 4th edition of the Mediterranean Games

1963 CONCACAF Championship — football tournament

1963 African Cup of Nations — football tournament

1963 Formula One season — sports season

EuroBasket 1963 — 1963 edition of the Eurobasket

1963 FIBA World Championship — 1963 edition of the FIBA World Championship

1963 South American Championship — football tournament

1963 public backlash in Pahlavi-dynasty Iran