Fait mathématique: 1855 is the number of permutations of 7 items that fix 1 element.
Culture générale: 1855 is a boring number.
Date historique: January 28th is the day in 1980 that USCGC Blackthorn collides with the tanker Capricorn while leaving Tampa Florida and capsizes killing 23 Coast Guard crewmembers.