The first month was called Januarius by the Romans, after Janus, the god of doors and gates. We see the same word in janua, the Latin for a gate or opening. From the idea that a door is a way in, an entrance, it became a custom among the Romans to pray to Janus whenever they undertook a new work. He was also the god of the beginning of the day, and it was only natural that when a new month was added at the beginning of the year it should be named after him. During this month offerings to the god were made of meal, frankincense, and wine, each of which had to be quite new.