If we were ancient Romans then it would be beginning on March 1st. If we were living in 1751 in England then our New Year would have begun on March 25th, Lady Day (Feast of the Annunciation). It was only changed to January 1st in 1752 when the Gregorian Calendar took over from the Julian Calendar in England. In various parts of the world under the Old Calendar of Pope Julius 1 (337- 352) New Year began sometimes at Christmas and other times at Easter.
So if you haven’t made your New Year resolution yet, just pick another starting date!