May 4 is the 124th day of the year (125th in leap years). There are 241 days remaining.
- 1826 — Thomas Jeffries died.
- 1910 — Louis Philippe is born.
- 1949 — Marvin Irvin is born.
- 1962 — Honoré Zanchi is born.
- 1970 — Karla Homolka is born.
- 1979 — Andre Jones is apprehended.
- 1986 — Janelle Cruz is murdered by Joseph DeAngelo.
- 1986 — Suzanne Denise Harrison, Bryan Drew Boone and Gena Lee Turner is murdered by Jerry McFadden.
- 1989 — Paul J. Cowart is murdered by Ray and Faye Copeland (possibly killed on May 3).
- 1990 — David Morton is apprehended.
- 1992 — Kenneth McDuff is apprehended.
- 1994 — Milton Joseph Bradley is murdered by Gary Ray Bowles.
- 1994 — Aladár Donászi is apprehended.
- 1999 — Edson Izidoro Guimarães is apprehended.
- 2006 — Casonya Crawford is murdered by Anthony Kirkland.
- 2016 — He Tiandai died.
- 2020 — Dishon Muturi Nderi is apprehended.
- 2023 — Carlos Dominguez is apprehended.