September 20 is the 263rd day of the year (264th in leap years). There are 102 days remaining.
- 1880 — Louise Peete is born.
- 1960 — Kyriakos Papachronis is born.
- 1960 — Randall Reffett (victim) is born.
- 1982 — Debra Estes is murdered by "Green River Killer".
- 1989 — James Paster died.
- 1995 — Charles Albanese died.
- 1996 — Robert Dean Weeks died.
- 2005 — Raymont Hopewell is apprehended.
- 2006 — Jeong Nam-gyu is sentenced to Death.