diff --git a/tinystatus b/tinystatus
index 5e841fb..0bcca7d 100755
--- a/tinystatus
+++ b/tinystatus
@@ -108,7 +108,7 @@ for file in "${tmp}/ok/"*.status; do
 done
 cat << EOF
 </ul>
-<p class=small> Last check: $(date -I'seconds')</p>
+<p class=small> Last check: $(date +%FT%T%z)</p>
 EOF
 if [ -f "${incidentsfile}" ]; then
     echo '<h1>Incidents</h1>'