The second month in the year, said to have been introduced into the Roman calendar by Numa. In common years this month contains twenty-eight days; in the bissextile, or leap year, it has twenty-nine days.
the month following January and preceding March
February is the second month of the year in the Julian and Gregorian calendars. It is the shortest month and the only month with fewer than 30 days. The month has 29 days in leap years, when the year number is divisible by four (except for years that are divisible by 100 and not by 400 in the Gregorian calendar).