In ancient Rome, March was called Martius. It was named after the war god (Mars) and was considered a lucky time to begin a war.
In ancient Hellenic civilization, March was called Anthesterion.
March was originally the first month of the Roman calendar. Julius Caesar's calendar reform in 45 BCE began the year on January 1. The tradition of starting the year in March continued in some countries for a long time. January 1 was only instituted as New Year's Day in France in 1564. Great Britain and her colonies continued to use March 25 until 1752, the same year they finally adopted to Gregorian calendar.
Historical names for March include the Saxon term Lenctmonat, named for the equinox and eventual lengthening of days and the eventual namesake of Lent. The Saxons also called March Rhed-monat (for their goddess Rhedam); ancient Britons called it hyld-monath (meaning loud or stormy).
One of the year's two equinoxes (called the vernal or spring equinox in the Northern Hemisphere and the autumnal equinox in the Southern Hemisphere) occurs on or around March 21.