old_contents: from datetime import datetime
  from dateutil.relativedelta import relativedelta
  
  
  class GithubDatePoints(object):
      MAX_HEIGHT = 7
      MAX_WIDTH = 51
  
      def __init__(self, pixel_set):
          self.__pixel_set = self.__normalize_pixel_set(pixel_set)
          self.__datetime_start_point = self.get_datetime_start_point()
  
      def __normalize_pixel_set(self, pixel_set):
          size = min(len(pixel_set), self.MAX_HEIGHT)
          pixel_set = pixel_set[:size]
          for i in range(size):
              pixel_set[i] = pixel_set[i][:self.MAX_WIDTH]
  
          return pixel_set
  
      def get_datetime_start_point(self):
  
          date_point = datetime.today()
          weekday = date_point.weekday()
  
          if weekday != 6:
              date_point = date_point - relativedelta(days=weekday, years=1)
  
          return date_point
  
      def get_date_points(self):
  
          dates = []
          for rows in range(len(self.__pixel_set)):
              for col in range(len(self.__pixel_set[rows])):
                  if self.__pixel_set[rows][col] != 0:
                      dates.append(self.__datetime_start_point + relativedelta(weeks=col, days=rows))
  
          return dates
  
new_contents: from datetime import datetime
  from dateutil.relativedelta import relativedelta
  
  
  class GithubDatePoints(object):
      MAX_HEIGHT = 7
      MAX_WIDTH = 51
  
      def __init__(self, pixel_set):
          self.__pixel_set = self.__normalize_pixel_set(pixel_set)
          self.__datetime_start_point = self.get_datetime_start_point()
  
      def __normalize_pixel_set(self, pixel_set):
          size = min(len(pixel_set), self.MAX_HEIGHT)
          pixel_set = pixel_set[:size]
          for i in range(size):
              pixel_set[i] = pixel_set[i][:self.MAX_WIDTH]
  
          return pixel_set
  
      def get_datetime_start_point(self):
  
          date_point = datetime.today()
          date_point = date_point + relativedelta(weeks=1)
  
          weekday = date_point.weekday()
  
          if weekday != 6:
              date_point = date_point - relativedelta(days=weekday, years=1)
  
          return date_point
  
      def get_date_points(self):
  
          dates = []
          for rows in range(len(self.__pixel_set)):
              for col in range(len(self.__pixel_set[rows])):
                  if self.__pixel_set[rows][col] != 0:
                      dates.append(self.__datetime_start_point + relativedelta(weeks=col, days=rows))
  
          return dates
  
subject: add week offset