diff --git a/modules/personal_activity/index_search1.html.erb b/modules/personal_activity/index_search1.html.erb
index fff8713..f51c040 100644
--- a/modules/personal_activity/index_search1.html.erb
+++ b/modules/personal_activity/index_search1.html.erb
@@ -32,8 +32,8 @@ $( ".selectbox" ).ready(function() {
       <th class="col-md-2">{{activity_name}}</th>
       <th class="col-md-1">{{activity_organizer}}</th>
       <th class="col-md-2 min-tablet">{{activity_area}}</th>
-      <th class="col-md-2 min-tablet-l">{{activity_start_date}}</th>
-      <th class="col-md-2 min-tablet-l">{{activity_end_date}}</th>
+      <th class="col-md-2 min-tablet-l" date-format="%Y-%m-%d">{{activity_start_date}}</th>
+      <th class="col-md-2 min-tablet-l" date-format="%Y-%m-%d">{{activity_end_date}}</th>
       <th class="col-md-2 min-tablet-l">{{note}}</th>
     </tr>
   </thead>