diff --git a/misc/bumpdates.sh b/misc/bumpdates.sh
new file mode 100755
index 0000000..69254bb
--- /dev/null
+++ b/misc/bumpdates.sh
@@ -0,0 +1,67 @@
+#!/bin/sh
+#-
+# Copyright (c) 2012 Dag-Erling Smørgrav
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer
+#    in this position and unchanged.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+# 3. The name of the author may not be used to endorse or promote
+#    products derived from this software without specific prior written
+#    permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+#
+# $Id$
+#
+
+error() {
+	echo "$@" >&2
+	exit 1
+}
+
+if [ ! -f configure.ac -o ! -f include/security/openpam_version.h ] ; then
+	error "script invoked from incorrect directory"
+fi
+
+if [ $# -ne 1 ] ; then
+	error "missing release name"
+fi
+
+release="$1"
+isodate=$(date +"%Y%m%d")
+mdocdate=$(date +"%B %e, %Y" | tr -s ' ')
+
+echo "openpam_version.h"
+perl -p -i -e '
+m/OPENPAM_RELEASE/ && s/\"\w+\"/\"'"${release}"'\"/;
+m/OPENPAM_VERSION/ && s/\d{8}/'"${isodate}"'/;
+' include/security/openpam_version.h
+
+echo "configure.ac"
+perl -p -i -e '
+m/AC_INIT/ && s/trunk|\d{8}/'"${isodate}"'/
+' configure.ac
+
+echo "man pages"
+perl -p -i -e '
+s/^\.Dd .*?$/.Dd '"${mdocdate}"'/;
+' $(find . -type f -name \*.[0-9])
+
+echo "check before commit!"