data date;
input day month year;
date = mdy(day, month, year);
format date mmddyy10.;
datalines;
25 12 2005
21 10 1946
;
proc print data=date;
run;

Last I checked there isn't a month number 25. The letters in the MDY() function stand for Month,Day,Year.
mdy(month, day, year)
@b384b7 wrote:
But the months are 12 and 10.. right?
If you call MDY(25,x,y) then the MONTH is 25.
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