Fatto matematico: 1861 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 1861 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: February 3rd is the day in 1637 that Tulip mania collapses in the United Provinces (now the Netherlands) as sellers could no longer find buyers for their bulb contracts.