From XFamily - Children of God
- April 22 — Body of Aaron (Paul Brandt Berg) found by two mountain climbers at the base of a large cliff on a mountain near Geneva, Switzerland.
- April 22 — Rachel (Barbara Kaliher Canevaro) marries Victor Emanuele Canevaro, the Duke of Zoagli, on the steps of a public plaza in Rome, Italy.
- July — David Berg proclaims his Mo Letters the Word of God with authority over the Bible: "Some of the parts of the Bible are no longer up to date! [...] You had better read what God said today in preference to what he said 2,000 or 4,000 years ago!"
 Press coverage
- Port Arthur News: Judge dismisses religious suit — 1973-02-18
- The Age: Controversial Sect At Congress 'To Learn' — 1973-02-22
- Manly Daily: Colony Comes to Town— 1973-03-24
- Edwardsville Intelligencer: 'Jesus Communes' Opposed by Parents — 1973-06-16
- Odessa American: Suit Against Parents Is Withdrawn — 1973-07-24
- Odessa American: 'Children' Drop Suit On Damages — 1973-07-30
- Washington Post: Children of God Suit Ended — 1973-08-03
- Lethbridge Herald: Children of God drop $1.1 million slander suit — 1973-08-04
- Texas Monthly: Let the Love Light Shine — 1973-10-01
- Lancaster Eagle Gazette: Pamphlets No Longer Allowed — 1973-11-21
See also: Previous Year - 1970s - Next Year