Fait général: 1377 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 1377 is the number of interior intersections when all the diagonals of a regular 16-gon are drawn.
Culture générale: 1377 is an uninteresting number.
Date historique: October 8th is the day in 2001 that a twin engine Cessna and Scandinavian Airlines System (SAS) jetliner collide in heavy fog during takeoff from Milan, Italy killing 118.