" We don't want to modify the sas code " 1)You could change this CSV file by data step as well(post a CSV file and desired output to clarify your question more). data _null_; infile 'c:\temp\have.csv'; file 'c:\temp\want.csv'; input; _infile_=prxchange('s/(\d\d)\.(\d\d)\.(\d\d\d\d)/\2.\1.\3/',-1,_infile_); put _infile_; run; 2)As BillSawyer said, you can change the system option: options DATESTYLE=MDY; ... View more