ROMAN CALENDAR • FREE TRANSLATOR.ORG • Definition of Roman calendar

... the gravest doubts upon the existence of any Teutonic festival at the winter solstice.[82] It appears from philology and the study of surviving customs that the Teutonic peoples had no knowledge of the solstices and equinoxes, and until the introduction of the Roman Calendar divided their year not into four parts but into two, three, and six, holding their New Year's Day with its attendant festivities not at the end of December or beginning of January, but towards the middle of November. At that time in Central ...

— Christmas in Ritual and Tradition, Christian and Pagan • Clement A. Miles