February is the month of Februa. In Latin Februarius means "month of Februa". Februa is the Roman festival of purification, held on February fifteenth.

It is possibly of Sabine origin. Februarius had 28 days, until circa 450 BC when it had 23 or 24 days on every second year, until Julius when it had 29 days on every fourth year and 28 days otherwise.