fix date sorting

layouts/termine/list.html

@@ -8,8 +8,8 @@
       <li class="list-inline-item m-3 text-uppercase" data-filter="past">Vergangen</li>
     </ul>
     <div class="filter-container row mx-auto">
-      {{ range .Params.events }}
-      <div class="filter-item col-12" data-groups="{{ if or (ge (.date | time.AsTime).Unix now.Unix) (and .enddate (ge (.enddate | time.AsTime).Unix now.Unix)) }}upcoming{{else}}past{{end}}" data-time="{{.date}}">
+      {{ range sort .Params.events ".date" }}
+      <div class="filter-item col-12" data-groups='{{if partial "data/termin-upcoming" .}}upcoming{{else}}past{{end}}'>
         {{ partial "termin" . }}
       </div>
       {{ end }}