#+BIND: org-html-postamble-format (("en" "<p class=\"postamble\">%T</p>")))
#+HTML_HEAD: <style>#postamble{ text-align: center; }</style>
#+HTML_HEAD: <style>pre {white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;}</style>