Current date in DD-Mmm-YYYY
===========================
$ date = f$extract(0,11,f$cvtime("","ABSOLUTE"))
$ YYYY = f$element(2,"-","''date'")
$ MMM = f$element(1,"-",date)
$ DD = f$element(0,"-",date)
$ newdate = "''YYYY'''MMM'''DD'"
Date X days ago from now
========================
$ testdate = f$cvtime("-X-")
$ write sys$output "testdate = ''testdate'"
where X is an integer
Current date in yyyy-mm-dd format with 0 prefixing single digit values
======================================================================
$ date = f$extract(0,10,f$cvtime(f$time()))