# File lib/mongo_mapper/extensions/date.rb, line 5
      def to_mongo(value)
        if value.nil? || (value.instance_of?(String) && '' === value)
          nil
        else
          date = value.instance_of?(::Date) || value.instance_of?(::Time) ? value : ::Date.parse(value.to_s)
          ::Time.utc(date.year, date.month, date.day)
        end
      rescue
        nil
      end