The Romans dedicated this day to Janus, the god of gates, doors, and beginnings. After Julius Caesar reformed the calendar in 46 BC and was subsequently murdered, the Roman Senate voted to deify him on the 1st January 42 BC  in honour of his life and his institution of the new rationalised calendar. The month originally owes its name to the deity Janus, who had two faces, one looking forward and the other looking backward. This suggests that New Year’s celebrations are founded on pagan traditions. Some have suggested this occurred in 153 BC, when it was stipulated that the two annual consuls (after whose names the years were identified) entered into office on that day, though no consensus exists on the matter. Dates in March, coinciding with the spring equinox, or commemorating the Annunciation of Jesus, along with a variety of Christian feast dates were used throughout the Middle Ages, though calendars often continued to display the months in columns running from January to December.
Most countries in Western Europe officially adopted January 1 as New Year’s Day somewhat before they adopted the Gregorian calendar. In England, the Feast of the Annunciation on March 25, was the first day of the new year until the adoption of the Gregorian Calendar in 1752. The March 25 date was known as Annunciation Style; the January 1 date was known as Circumcision Style, because this was the date of the Feast of the Circumcision, being the eighth day counting from December 25 when Christ was believed to be born. This day was christened as the beginning of the New Year by Pope Gregory as he designed the Liturgical Calendar.