Thank you, it works fine, I didnt know about the scan function
This works :
Data _null_ ;
%let entry_date_time_orig = "10/13/2007 01:14:35" ;
entry_date_time=sum((input(scan(&entry_date_time_orig.,1,' '),mmddyy10.)*60*60*24),input(scan(&entry_date_time_orig.,2,' '),time8.));
put...