Masonic Year
The Masonic Year, at least in Pennsylvania, starts at Noon on 27 December and ends at Noon on 27 December of the next year. This Day is the Feast Day of Saint John the Evangelist, and this date is known to Freemasons as Saint John's Day. The starting Day or Ending Day may be on 28 December if 27 December is on a Sunday.
The Worshipful Master and all other Elected Officers and Appointed Officers are either Elected or Appointed for one Masonic Year at a time but they can be reelected or reappointed for additional years.