The month of February is said to have been invented by the legendary second King of Rome, Numa Pompilius in 713BC.
Before then, the Roman calendar ended with December and did not begin again until March.
Before Julius Caesar reformed the calendar in 46BC, February was the only month with an even number of days. Februarius, as the Romans called it, took its name from februa, 'means of cleansing'.
This was the cleansing appropriate to the ushering in of spring and a new year.
Even after Caesar's calendar reform, which brought in leap years, the last day of February was still always the 28th. The extra day every fourth year was gained by counting the 24th twice.
February is the only month that can pass without a full moon. This last happened in 1999 and will next happen in 2018.
Much Ado About Nothing is the only Shakespeare play that mentions February: "You have such a February face, So full of frost, of storm and cloudiness"