Fatto generale: 2693 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 2693 is an uninteresting number.
Trivia: 2693 is an uninteresting number.
Data storica: May 16th is the day in 1966 that the Communist Party of China issues the "May 16 Notice", marking the beginning of the Cultural Revolution.