hrs:min:sec:.. format: data _null_;
seconds = 3*60*60 + /* 3 hours */
18*60 + /* 18 minutes */
27 + /* 27 seconds */
35/100 ; /* 35 hundreths of a second */
put seconds time. ; /* 3:18:27 */
put seconds time12.3; /* 3:18:27.350 */
run;