diff --git a/module/execution/ui/task.html.php b/module/execution/ui/task.html.php
index 909704d688..9c60ec3be8 100644
--- a/module/execution/ui/task.html.php
+++ b/module/execution/ui/task.html.php
@@ -52,6 +52,15 @@ if(common::canModify('execution', $execution))
 
 $cols = $this->loadModel('datatable')->getSetting('execution');
 $tableData = initTableData($tasks, $cols, $this->task);
+$tableData = array_map(
+    function($task)
+    {
+        if(helper::isZeroDate($task->deadline))   $task->deadline   = '';
+        if(helper::isZeroDate($task->estStarted)) $task->estStarted = '';
+        return $task;
+    },
+    $tableData
+);
 
 toolbar
 (
diff --git a/module/task/ui/view.html.php b/module/task/ui/view.html.php
index ca5b0a6a4f..1db4ae73d8 100644
--- a/module/task/ui/view.html.php
+++ b/module/task/ui/view.html.php
@@ -481,7 +481,7 @@ detailBody
                     item
                     (
                         set::name($lang->task->estStarted),
-                        $task->estStarted
+                        helper::isZeroDate($task->estStarted) ? '' : $task->estStarted
                     ),
                     item
                     (
@@ -491,7 +491,7 @@ detailBody
                     item
                     (
                         set::name($lang->task->deadline),
-                        $task->deadline
+                        helper::isZeroDate($task->deadline) ? '' : $task->deadline
                     )
                 )
             ),