Fatto generale: 1786 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 1786 is a boring number.
Trivia: 1786 is an uninteresting number.
Data storica: November 20th is the day in 1407 that a truce between John the Fearless, Duke of Burgundy and Louis of Valois, Duke of Orléans is agreed under the auspices of John, Duke of Berry.