code: def number_to_day(self, day_number):
          
          return [
              calendar.day_name[6],
              calendar.day_name[0],
              calendar.day_name[1],
              calendar.day_name[2],
              calendar.day_name[3],
              calendar.day_name[4],
              calendar.day_name[5]
          ][day_number]
docs: Returns localized day name by its CRON number
  
          Args:
              day_number: Number of a day
          Returns:
              Day corresponding to day_number
          Raises:
              IndexError: When day_number is not found