Fatto matematico: 1380 is the number of intersections when all the diagonals of a regular 15-gon are drawn.
Trivia: 1380 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: October 11th is the day in 1975 that the NBC sketch comedy/variety show Saturday Night Live debuts with George Carlin as the host and Andy Kaufman, Janis Ian and Billy Preston as guests.