(multiple-value-bind (sec min hr dy mn yr) (decode-universal-time tm)
(pretty-date yr mn dy hr min sec)))
-(defun date-string (ut)
+(defun date-string (&optional (ut (get-universal-time)))
(if (typep ut 'integer)
(multiple-value-bind (sec min hr day mon year dow daylight-p zone)
(decode-universal-time ut)