module TwitterCldr
  module Timezones
    class Location
      attr_reader :tz

      def initialize(tz)
        @tz = tz
      end

      def tz_id
        tz.identifier
      end

      def resource
        @resource ||= TwitterCldr.get_locale_resource(tz.locale, :timezones)[tz.locale]
      end

      private

      def get_period_for_naming(date)
        tz.period_for_local(date, &:first)
      end
    end
  end
end

module TwitterCldr
  module Timezones
    class Location
      attr_reader :tz

      def initialize(tz)
        @tz = tz
      end

      def tz_id
        tz.identifier
      end

      def resource
        @resource ||= TwitterCldr.get_locale_resource(tz.locale, :timezones)[tz.locale]
      end
    end
  end
end

--- 
+++ 
@@ -14,6 +14,12 @@
       def resource
         @resource ||= TwitterCldr.get_locale_resource(tz.locale, :timezones)[tz.locale]
       end
+
+      private
+
+      def get_period_for_naming(date)
+        tz.period_for_local(date, &:first)
+      end
     end
   end
 end
Add helper for getting correct period when getting a TZ name
