diff --git a/website/agenda/planung/calendar.cgi b/website/agenda/planung/calendar.cgi
index b62397e..cf34f5e 100755
--- a/website/agenda/planung/calendar.cgi
+++ b/website/agenda/planung/calendar.cgi
@@ -862,7 +862,7 @@ sub showEventList {
               . time::dayOfYear( $event->{start} )
               . q!</td>!
               . qq!<td class="weekday">$event->{weekday_short_name},</td>!
-              . qq!<td class="start_date">$event->{start_date_name}</td>!
+              . qq!<td class="start_date" data-text="$event->{start_datetime}">$event->{start_date_name}</td>!
               . qq!<td class="start_time">$event->{start_time_name} - $event->{end_time}</td>!
               . qq!<td class="series_name">$event->{series_name}</td>!
               . qq!<td class="title">$title</td>!