- A car bomb explodes in Sackville Place, Dublin, Republic of Ireland, killing 1 person and injuring 17 (no organisation claimed responsibility)
Richard Nixon's second inauguration as President of the United States takes place in Washington, D.C.
- Queen Mathilde of Belgium, born in Uccle, Belgium
- Amilcar Cabral, Bissau-Guinean nationalist leader, fought for Guinea Bissau independence, murdered at 51
- Lorenz Böhler, Austrian physician (b. 1885)