Wikipedia:Selected anniversaries/December 3
- 1901 - U.S. President Theodore Roosevelt delivered a speech to the House of Representatives asking Congress to curb the power of trusts "within reasonable limits."
- 1904 - The Jovian moon Himalia was discovered by Charles Dillon Perrine at Lick Observatory in San Jose, California.
- 1967 - A team headed by Christiaan Barnard at Groote Schuur Hospital in Cape Town, South Africa, performed the first heart transplant on a human, operating on 53-year-old Lewis Washkansky.
- 1984 - The Bhopal gas disaster, the world's worst industrial accident, resulted in at least 18,000 deaths in the Indian city of Bhopal.
Recent days: December 2 – December 1 – November 30