Historical Events
- John William Draper takes 1st successful photo in US of the Moon (daguerreotype), in New York City
Famous Deaths
- William Maclure, Scottish-American Geologist (first geological map), dies at 76
1840 Highlights
About March 23, 1840
Day of the Week: Monday
How Long Ago? 183 years, 2 months and 16 days
Leap Year: Yes
Star Sign: Aries
