It is the belief of this writer that the new year must be begun fully after the turn of the season, and not in winter. The Jewish calendar may begin their 1st month of the year before the turn of the season, as long as Passover does not fall before the turn of the year. This writer believes that the 1st new moon of the year must occur following the turn of the season.
Here is the calendar for the 1st month of the new Biblical year;