Fatto matematico: 1205 is the number of fullerenes with 58 carbon atoms.
Trivia: 1205 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: April 19th is the day in 65 that the freedman Milichus betrayed Piso’s plot to kill the Emperor Nero and all the conspirators were arrested.