Famous Birthdays
- Paul Ehrenfest, Austrian-Dutch theoretical physicist (phase transition, Ehrenfest theorem), born in Vienna, Austro-Hungarian Empire (d. 1933)
About January 18, 1880
Calendar: Gregorian
Day of the Week: Sunday
How Long Ago? 144 years, 5 months and 25 days
Leap Year: Yes
Star Sign: Capricorn
