diff --git a/app/views/admin/calendars/_form.html.erb b/app/views/admin/calendars/_form.html.erb
index c919b4a..b9f8f47 100644
--- a/app/views/admin/calendars/_form.html.erb
+++ b/app/views/admin/calendars/_form.html.erb
@@ -124,7 +124,7 @@
     </label>
   </div>
 </div>
-<% data_format = (@event.all_day || @event.new_record?) ? 'yyyy/MM/dd' : 'yyyy/MM/dd hh:mm' %>
+<% data_format = @event.all_day ? 'yyyy/MM/dd' : 'yyyy/MM/dd hh:mm' %>
 <div class="control-group">
   <%= f.label t("start_date"), :class=>"control-label" %>
   <%#= f.datetime_select :start %>