Lispworks 6.1 on Win 7:
CL-USER 1 > (asdf :simple-date) ; Loading text file C:\Users\jens\quicklisp\dists\quicklisp\software\postmodern-20130312-git\simple-date.asd ;; Creating system "SIMPLE-DATE->SIMPLE-DATE" ;; Creating system "SIMPLE-DATE" ;; Creating system "SIMPLE-DATE-POSTGRES-GLUE->SIMPLE-DATE" ;; Creating system "SIMPLE-DATE-POSTGRES-GLUE" ;; Creating system "SIMPLE-DATE-TESTS->SIMPLE-DATE" ;; Creating system "SIMPLE-DATE-TESTS" ; Loading fasl file C:\Users\jens\AppData\Local\common-lisp\cache\lw-6.1.1-win-x86\C\Users\jens\quicklisp\dists\quicklisp\software\postmodern-20130312-git\simple-date\simple-date.ofasl #<ASDF:LOAD-OP NIL 21C90697> ((#<ASDF:LOAD-OP NIL 21C90697> . #<ASDF:CL-SOURCE-FILE "simple-date" "simple-date" "simple-date">) (#<ASDF:LOAD-OP NIL 21C90697> . #<ASDF:MODULE "simple-date" "simple-date">) (#<ASDF:LOAD-OP NIL 21C90697> . #<ASDF:SYSTEM "simple-date">))
CL-USER 2 > (in-package :simple-date) #<The SIMPLE-DATE package, 27/64 internal, 19/64 external>
SIMPLE-DATE 3 > (encode-timestamp 2013 4 16) #<TIMESTAMP 16-04-2013T00:00:00>
SIMPLE-DATE 4 > (timestamp-to-universal-time *) #<pointer out of memory bounds: 1FFB17E7>
regards jens