February

February, the second month of the year, was added along with January by Numa to the end of the original Roman year of 10 months; derived its name from a festival offered annually on the 15th day to Februus, an ancient Italian god of the nether world; was assigned its present position in the calendar by Julius Cæsar, who also introduced the intercalary day for leap-year.

Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)