old_contents: from datetime import date
  from ..core import WesternCalendar
  from ..registry_tools import iso_register
  
  
  @iso_register('LV')
  class Latvia(WesternCalendar):
      'Latvia'
  
      # Civil holidays
      include_labour_day = True
      FIXED_HOLIDAYS = WesternCalendar.FIXED_HOLIDAYS + (
          (6, 23, "Midsummer Day"),
          (6, 24, "St. John's Day"),
          (11, 18, "Proclamation Day"),
          (12, 31, "New Years Eve"),
      )
  
      # Christian holidays
      include_good_friday = True
      include_easter_sunday = True
      include_easter_monday = True
      include_christmas_eve = True
      include_christmas = True
      include_boxing_day = True
  
      def get_independence_days(self, year):
          """returns a possibly empty list of (date, holiday_name) tuples"""
          days = []
          if year > 2004:
              actual_date = date(year, 5, 4)
              days = [(actual_date, "Restoration of Independence Day")]
              if actual_date.weekday() in self.get_weekend_days():
                  days += [(self.find_following_working_day(actual_date),
                            "Restoration of Independence Observed")]
          return days
  
      def get_republic_days(self, year):
          """returns a possibly empty list of (date, holiday_name) tuples"""
          days = []
          if year > 1918:
              actual_date = date(year, 11, 18)
              days = [(actual_date, "Proclamation of Republic Day")]
              if actual_date.weekday() in self.get_weekend_days():
                  days += [(self.find_following_working_day(actual_date),
                            "Proclamation of Republic Observed")]
          return days
  
      def get_variable_days(self, year):
          days = super().get_variable_days(year)
          days.extend(self.get_independence_days(year))
          days.extend(self.get_republic_days(year))
          return days
  
new_contents: from datetime import date
  from ..core import WesternCalendar
  from ..registry_tools import iso_register
  
  
  @iso_register('LV')
  class Latvia(WesternCalendar):
      'Latvia'
  
      # Civil holidays
      include_labour_day = True
      FIXED_HOLIDAYS = WesternCalendar.FIXED_HOLIDAYS + (
          (6, 23, "Midsummer Day"),
          (6, 24, "St. John's Day"),
          (12, 31, "New Years Eve"),
      )
  
      # Christian holidays
      include_good_friday = True
      include_easter_sunday = True
      include_easter_monday = True
      include_christmas_eve = True
      include_christmas = True
      include_boxing_day = True
  
      def get_independence_days(self, year):
          """returns a possibly empty list of (date, holiday_name) tuples"""
          days = []
          if year > 2004:
              actual_date = date(year, 5, 4)
              days = [(actual_date, "Restoration of Independence Day")]
              if actual_date.weekday() in self.get_weekend_days():
                  days += [(self.find_following_working_day(actual_date),
                            "Restoration of Independence Observed")]
          return days
  
      def get_republic_days(self, year):
          """returns a possibly empty list of (date, holiday_name) tuples"""
          days = []
          if year > 1918:
              actual_date = date(year, 11, 18)
              days = [(actual_date, "Proclamation of Republic Day")]
              if actual_date.weekday() in self.get_weekend_days():
                  days += [(self.find_following_working_day(actual_date),
                            "Proclamation of Republic Observed")]
          return days
  
      def get_variable_days(self, year):
          days = super().get_variable_days(year)
          days.extend(self.get_independence_days(year))
          days.extend(self.get_republic_days(year))
          return days
  
subject: Remove duplicate Proclamation Day for Latvia