# File lib/et-orbi/eo_time.rb, line 228
    def monthdays

      date = to_time

      pos = 1
      d = self.dup

      loop do
        d.add(-WEEK_S)
        break if d.month != date.month
        pos = pos + 1
      end

      neg = -1
      d = self.dup

      loop do
        d.add(WEEK_S)
        break if d.month != date.month
        neg = neg - 1
      end

      [ "#{date.wday}##{pos}", "#{date.wday}##{neg}" ]
    end