Valid SAS(c) date formats pulled from https://documentation.sas.com/doc/en/vdmmlcdc/8.1/ds2pg/p0bz5detpfj01qn1kz2in7xymkdl.htm
Valid SAS(c) date formats pulled from https://documentation.sas.com/doc/en/vdmmlcdc/8.1/ds2pg/p0bz5detpfj01qn1kz2in7xymkdl.htm