March is named for the planet Mars, also the Roman God. During this month the sun will begin its year long transit through all 12 signs when it enters the first sign, Aries March 20, the Vernal Equinox. It is the astrological New Year.
March is thought to come in like a lion and leave like a lamb that often refers to the weather. Another quote is from Shakespeare that is, "Beware the ides of March."