<p><a href="/calendar_txt">basic view</a></p>
<form action="calendar" method="GET">
-from <input name="start" value="{{start}}" />
-to <input name="end" value="{{end}}" />
+from <input name="start" class="date" value="{{start}}" />
+to <input name="end" class="date" value="{{end}}" />
<input type="submit" value="OK" />
</form>
<table>