Hecho matemático: 1677 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 1677 is a boring number.
Fecha histórica: August 3rd is the day in 1936 that a fire wipes out Kursha-2 in the Meshchera Lowlands, Ryazan Oblast, Russia, killing 1,200 and leaving only 20 survivors.