Wikipedia:Selected anniversaries/September 17
- 1787 - The text of the United States Constitution was agreed in Philadelphia
- 1939 - The Soviet Union joined Nazi Germany's invasion of Poland during the Polish Defence War of 1939
- 1976 - The first Space Shuttle, Enterprise, was unveiled by NASA
- 1978 - The Camp David Accords were signed by Israel and Egypt
- 1983 - Vanessa Williams becomes first African-American Miss America
Recent days: September 16 – September 15 – September 14