Multiple choice general knowledge sports Why was the month December named so? It was the tenth month of Roman Calendar Named after the Roman God, Decca It was the 12th month of Roman Calendar Named after the Roman festival Reveal answer Fill a bubble to check yourself A Correct answer Explanation December comes from Latin "decem" meaning ten. In the original Roman calendar, it was the tenth month. When January and February were added around 713 BCE, it became the twelfth month but retained its name.