Fatto generale: 2580 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 2580 is a boring number.
Trivia: 2580 is an unremarkable number.
Data storica: January 23rd is the day in 1973 that a volcanic eruption devastates Heimaey in the Vestmannaeyjar chain of islands off the south coast of Iceland.