+# Calc number of months from then to (about) Nov 2037.
+# We're sticking to a 2038 cutoff for now, to maintain support for 32b systems,
+# but will have to give that up in only a few years.
+#
+tgt_secs=`date -d 'Nov 25 2037' +%s`
+now_secs=`date +%s`
+diff_months=$(( ($tgt_secs - $now_secs) / 60 / 60 / 24 / 31 ))
+