diff --git a/js/app/views/IntervalUI.js b/js/app/views/IntervalUI.js
index 9639d3d..46f7009 100644
--- a/js/app/views/IntervalUI.js
+++ b/js/app/views/IntervalUI.js
@@ -187,6 +187,7 @@ Ext.define('amdaUI.IntervalUI', {
                 {
 					xtype: 'datefield',
 					name: fieldName,
+					emptyText: 'YYYY/MM/DD hh:mm:ss',
 					format: 'Y/m/d H:i:s',
 					enforceMaxLength: true,
 					maxLength: 19,
--
libgit2 0.21.2