    # File lib/chef/resource/cron.rb, line 77
          def day(arg=nil)
            if arg.is_a?(Integer)
              converted_arg = arg.to_s
            else
              converted_arg = arg
            end
            begin
              if integerize(arg) > 31 then raise RangeError end
            rescue ArgumentError
            end
            set_or_return(
              :day,
              converted_arg,
              :kind_of => String
            )
          end