Here’s one to change a 6,0 numeric date in MMDDYY form to 7,0 numeric date in CYYMMDD form.

Eval INTERNAL_DATE = %dec(%char(%date(EXTERNAL_DATE:*mdy) :*cymd0):7:0)

INTERAL_DATE is the 7,0 CYYMMDD date.

EXTERNAL_DATE is the 6,0 MMDDYY date.