diff --git a/lib/zin/wg/backbtn/v1.php b/lib/zin/wg/backbtn/v1.php
index 0d68166d67..0580180971 100644
--- a/lib/zin/wg/backbtn/v1.php
+++ b/lib/zin/wg/backbtn/v1.php
@@ -43,7 +43,7 @@ class backBtn extends btn
         global $app;
 
         $backs = array(
-            'task'           => 'execution-task,my-work,my-contribute,execution-tree,execution-grouptask,project-execution,product-track,repo-view,story-change,execution-kanban,execution-taskkanban,my-index,feedback-adminview,projectstory-track',
+            'task'           => 'execution-task,my-work,my-contribute,execution-tree,execution-grouptask,project-execution,product-track,repo-view,story-change,execution-kanban,execution-taskkanban,my-index,feedback-adminview,projectstory-track,execution-calendar',
             'story'          => 'product-browse,projectstory-story,execution-story,my-work,my-contribute,productplan-view,build-view,projectbuild-view,product-track,repo-view,testcase-zerocase,my-index,feedback-adminview,projectstory-track,task-view',
             'bug'            => 'bug-browse,project-bug,my-work,my-contribute,execution-bug,bug-view,qa-index,execution-task,product-track,execution-task,task-view,repo-view,story-change,repo-review,feedback-adminview,my-index,projectstory-track',
             'testcase'       => 'testcase-browse,project-testcase,my-work,my-contribute,execution-testcase,testtask-cases,testsuite-view,product-browse,testcase-view,qa-index,caselib-browse,product-track,story-change,my-index,projectstory-track',