I do not know an answer and think that it’s a limitation of the current define.xml standard. Today you cannot specify SAS Date/Time formats in define.xml file.
The CDISC team is working on new (#2) version of define.xml standard. Wait for it.
I am creating the define.xml file for ADaM and am wondering how to print display information in the “Controlled Terms or Format” column. Eg. TRTSDT uses YYMMDD10. SAS format.