data _null_;
dt = datetime();
dy = date();
put "+--- NLDATEYMM min=5 default=11
max=200 ---+";
put dy nldateymm.;
put dy nldateymm7.;
put dy nldateymm11.;
put dy nldateymm200.;
run;
+--- NLDATEYMM min=5 default=11 max=200 ---+ Nov 2012 11/2012 Nov 2012 Nov 2012