select_date

# File actionpack/lib/action_view/helpers/date_helper.rb, line 678
      def select_date
        order = date_order.dup

        @options[:discard_hour]     = true
        @options[:discard_minute]   = true
        @options[:discard_second]   = true

        @options[:discard_year]   ||= true unless order.include?(:year)
        @options[:discard_month]  ||= true unless order.include?(:month)
        @options[:discard_day]    ||= true if @options[:discard_month] || !order.include?(:day)

        # If the day is hidden and the month is visible, the day should be set to the 1st so all month choices are
        # valid (otherwise it could be 31 and February wouldn't be a valid date)
        if @datetime && @options[:discard_day] && !@options[:discard_month]
          @datetime = @datetime.change(:day => 1)
        end

        [:day, :month, :year].each { |o| order.unshift(o) unless order.include?(o) }

        build_selects_from_types(order)
      end