diff --git a/docs/en_US/release_notes_4_21.rst b/docs/en_US/release_notes_4_21.rst
index ec540618b..2e2975a88 100644
--- a/docs/en_US/release_notes_4_21.rst
+++ b/docs/en_US/release_notes_4_21.rst
@@ -21,6 +21,7 @@ Bug fixes
 *********
 
 | `Issue #3645 <https://redmine.postgresql.org/issues/3645>`_ -  Ensure that the start and end date should be deleted when clear the selection for pgAgent Job.
+| `Issue #4512 <https://redmine.postgresql.org/issues/4512>`_ -  Fixed calendar opening issue on the exception tab inside the schedules tab of pgAgent.
 | `Issue #5180 <https://redmine.postgresql.org/issues/5180>`_ -  Fixed an issue where the autovacuum_enabled parameter is added automatically in the RE-SQL when the table has been created using the WITH clause.
 | `Issue #5268 <https://redmine.postgresql.org/issues/5268>`_ -  Fixed generated SQL when any token in FTS Configuration or any option in FTS Dictionary is changed.
 | `Issue #5314 <https://redmine.postgresql.org/issues/5314>`_ -  Ensure that switch cell is in sync with switch control for accessibility.
diff --git a/web/pgadmin/static/js/backgrid.pgadmin.js b/web/pgadmin/static/js/backgrid.pgadmin.js
index 438c5e359..a5833c4e8 100644
--- a/web/pgadmin/static/js/backgrid.pgadmin.js
+++ b/web/pgadmin/static/js/backgrid.pgadmin.js
@@ -1770,6 +1770,10 @@ define([
             showToday: true,
           },
           toolbarPlacement: 'top',
+          widgetPositioning: {
+            horizontal: 'auto',
+            vertical: 'bottom',
+          },
           keepOpen: false,
         }, evalF(this.column.get('options')), {
           keyBinds: {
diff --git a/web/pgadmin/static/scss/_pgadmin.style.scss b/web/pgadmin/static/scss/_pgadmin.style.scss
index f04cea8f9..3eae9a480 100644
--- a/web/pgadmin/static/scss/_pgadmin.style.scss
+++ b/web/pgadmin/static/scss/_pgadmin.style.scss
@@ -884,8 +884,8 @@ body {
 table.table-noouter-border {
   border: none !important;
 
-  tbody tr:last-of-type{
-    & td {
+  & > tbody > tr:last-of-type{
+    &  > td {
       border-bottom: $table-border-width solid transparent;
     }
   }