--- ./bin/ssl-cert/check-cert.sh.in.orig	Sat Dec 30 16:41:04 2006
+++ ./bin/ssl-cert/check-cert.sh.in	Sat Dec 30 16:41:37 2006
@@ -216,7 +216,7 @@
     now=`date +%s`
     if [ $? -eq 0 ] # date command support epoch format
     then
-        exp=`date --date="${cert_expires}" +%s`
+        exp=`date -j -f "%b %d %T %Y %Z" "${cert_expires}" +%s`
         remaining=$(($exp - $now))
 
         if [ ${remaining} -le 0 ] # cert expired