diff --git a/api/js/jsapi/egw_app.js b/api/js/jsapi/egw_app.js
index 08a036a7fd..e0c1c5dac3 100644
--- a/api/js/jsapi/egw_app.js
+++ b/api/js/jsapi/egw_app.js
@@ -138,18 +138,22 @@ var EgwApp = /** @class */ (function () {
      * It can use the extra _data parameter to determine if the client has read access to
      * the entry - if an update of the list is necessary.
      *
-     * @param {string} _type either 'update', 'edit', 'delete', 'add' or null
+     * @param _type either 'update', 'edit', 'delete', 'add' or null
      * - update: request just modified data from given rows.  Sorting is not considered,
      *		so if the sort field is changed, the row will not be moved.
      * - edit: rows changed, but sorting may be affected.  Requires full reload.
      * - delete: just delete the given rows clientside (no server interaction neccessary)
      * - add: requires full reload for proper sorting
-     * @param {string} _app application name
-     * @param {(string|number)} _id id of entry to refresh or null
-     * @param {mixed} _data eg. owner or responsible to decide if update is necessary
+     * @param _app application name incl. sub-type eg. "projectmanager-element"
+     * @param _id id of entry to refresh or null
+     * @param _data eg. owner or responsible to decide if update is necessary
      * @returns {undefined}
      */
     EgwApp.prototype.push = function (_type, _app, _id, _data) {
+        // only handle delete by default, for simple case of uid === "$app::$id"
+        if (_type === 'delete') {
+            egw.dataDeleteUID(_app + '::' + _id);
+        }
     };
     /**
      * Open an entry.
@@ -1632,3 +1636,4 @@ var EgwApp = /** @class */ (function () {
     return EgwApp;
 }());
 exports.EgwApp = EgwApp;
+//# sourceMappingURL=egw_app.js.map
\ No newline at end of file
diff --git a/api/js/jsapi/egw_app.ts b/api/js/jsapi/egw_app.ts
index 428b2691be..1bac01d2c5 100644
--- a/api/js/jsapi/egw_app.ts
+++ b/api/js/jsapi/egw_app.ts
@@ -209,20 +209,24 @@ export abstract class EgwApp
 	 * It can use the extra _data parameter to determine if the client has read access to
 	 * the entry - if an update of the list is necessary.
 	 *
-	 * @param {string} _type either 'update', 'edit', 'delete', 'add' or null
+	 * @param _type either 'update', 'edit', 'delete', 'add' or null
 	 * - update: request just modified data from given rows.  Sorting is not considered,
 	 *		so if the sort field is changed, the row will not be moved.
 	 * - edit: rows changed, but sorting may be affected.  Requires full reload.
 	 * - delete: just delete the given rows clientside (no server interaction neccessary)
 	 * - add: requires full reload for proper sorting
-	 * @param {string} _app application name
-	 * @param {(string|number)} _id id of entry to refresh or null
-	 * @param {mixed} _data eg. owner or responsible to decide if update is necessary
+	 * @param _app application name incl. sub-type eg. "projectmanager-element"
+	 * @param _id id of entry to refresh or null
+	 * @param _data eg. owner or responsible to decide if update is necessary
 	 * @returns {undefined}
 	 */
-	push(_type, _app, _id, _data)
+	push(_type : string, _app : string, _id : string|number, _data? : any)
 	{
-
+		// only handle delete by default, for simple case of uid === "$app::$id"
+		if (_type === 'delete')
+		{
+			egw.dataDeleteUID(_app+'::'+_id);
+		}
 	}
 
 	/**
diff --git a/api/src/Link.php b/api/src/Link.php
index d441db8d97..ae28ebde5f 100644
--- a/api/src/Link.php
+++ b/api/src/Link.php
@@ -58,7 +58,7 @@ namespace EGroupware\Api;
  *			'add_app'    => 'link_app',				// name of get parameter to add links to other app
  *			'add_id'     => 'link_id',				// --------------------- " ------------------- id
  *          'add_popup' => '400x300',				// size of popup (XxY), if add is in popup
- *			'notify' => 'app.class.method',			// method to be called if an other applications liks or unlinks with app: notify(array $data)
+ *			'notify' => 'app.class.method',			// method to be called if an other applications links or unlinks with app: notify(array $data)
  * 			'file_access' => 'app.class.method',	// method to be called to check file access rights of a given user, see links_stream_wrapper class
  *													// boolean file_access(string $id,int $check,string $rel_path=null,int $user=null)
  * 			'file_access_user' => false,			// true if file_access method supports 4th parameter $user, if app is NOT supporting it
@@ -91,6 +91,9 @@ namespace EGroupware\Api;
  *          ),
  *			'fetch'	=>	'app.class.method',			// method to return entry data for a given id. the method called should support id, and expected mime-type
  *													// basically you should return something like array(id, title, mimetype, body, linked-files)
+ *
+ *          'push_data' => "key" | ["key1", ...]    // keys of ACL relevant and privacy save data needed for push of changes to client
+ *
  *			'additional' => array(					// allow one app to register sub-types,
  *				'app-sub' => array(					// different from 'types' approach above
  *					// every value defined above
@@ -590,9 +593,9 @@ class Link extends Link\Storage
 					if (is_array($link)) $app_ids[$link['app']][] = $link['id'];
 				}
 			}
-			foreach($app_ids as $app => $a_ids)
+			foreach($app_ids as $a_app => $a_ids)
 			{
-				self::titles($app,array_unique($a_ids));
+				self::titles($a_app,array_unique($a_ids));
 			}
 		}
 		return $links;
@@ -694,6 +697,14 @@ class Link extends Link\Storage
 		{
 			if (!$link_id && !$app2 && !$id2 && $app2 != '!'.self::VFS_APPNAME)
 			{
+				// in case "someone" interested in all changes (used eg. for push)
+				Hooks::process([
+					'location' => 'notify-all',
+					'type'     => 'delete',
+					'app'      => $app,
+					'id'       => $id,
+				], null, true);
+
 				self::delete_attached($app,$id);	// deleting all attachments
 				self::delete_cache($app,$id);
 			}
@@ -1482,6 +1493,15 @@ class Link extends Link\Storage
 			// Update client side with new title
 			Json\Response::get()->apply('egw.link_title_callback',array(array($app => array($id => self::title($app, $id)))));
 		}
+
+		// in case "someone" interested in all changes (used eg. for push)
+		Hooks::process([
+			'location' => 'notify-all',
+			'type'     => 'edit',
+			'app'      => $app,
+			'id'       => $id,
+			'data'     => $data,
+		], null, true);
 	}
 
 	/**
diff --git a/timesheet/inc/class.timesheet_hooks.inc.php b/timesheet/inc/class.timesheet_hooks.inc.php
index d3d795b69c..b83d6add86 100644
--- a/timesheet/inc/class.timesheet_hooks.inc.php
+++ b/timesheet/inc/class.timesheet_hooks.inc.php
@@ -67,7 +67,8 @@ class timesheet_hooks
 			'file_access'=> TIMESHEET_APP.'.timesheet_bo.file_access',
 			'file_access_user' => true,	// file_access supports 4th parameter $user
 			'notify'     => TIMESHEET_APP.'.timesheet_bo.notify',
-			'merge' => true,
+			'merge'      => true,
+			'push_data'  => 'ts_owner',
 		);
 	}
 
diff --git a/timesheet/js/app.js b/timesheet/js/app.js
index 63bf2661ce..57eac75487 100644
--- a/timesheet/js/app.js
+++ b/timesheet/js/app.js
@@ -170,6 +170,32 @@ var TimesheetApp = /** @class */ (function (_super) {
         if (widget)
             return widget.options.value;
     };
+    /**
+     * Push method receives push notification about updates to entries from the application
+     *
+     * It can use the extra _data parameter to determine if the client has read access to
+     * the entry - if an update of the list is necessary.
+     *
+     * @param _type either 'update', 'edit', 'delete', 'add' or null
+     * - update: request just modified data from given rows.  Sorting is not considered,
+     *		so if the sort field is changed, the row will not be moved.
+     * - edit: rows changed, but sorting may be affected.  Requires full reload.
+     * - delete: just delete the given rows clientside (no server interaction neccessary)
+     * - add: requires full reload for proper sorting
+     * @param _app application name incl. sub-type eg. "projectmanager-element"
+     * @param _id id of entry to refresh or null
+     * @param _data eg. owner or responsible to decide if update is necessary
+     * @returns {undefined}
+     */
+    TimesheetApp.prototype.push = function (_type, _app, _id, _data) {
+        console.log('app.timesheet.push', arguments);
+        switch (_type) {
+            case 'delete':
+                _super.prototype.push.apply(this, arguments);
+                break;
+        }
+    };
     return TimesheetApp;
 }(egw_app_1.EgwApp));
 app.classes.timesheet = TimesheetApp;
+//# sourceMappingURL=app.js.map
\ No newline at end of file
diff --git a/timesheet/js/app.ts b/timesheet/js/app.ts
index 17da1918c0..3e9c0b50ed 100644
--- a/timesheet/js/app.ts
+++ b/timesheet/js/app.ts
@@ -191,6 +191,35 @@ class TimesheetApp extends EgwApp
 		var widget = this.et2.getWidgetById('ts_title');
 		if(widget) return widget.options.value;
 	}
+
+	/**
+	 * Push method receives push notification about updates to entries from the application
+	 *
+	 * It can use the extra _data parameter to determine if the client has read access to
+	 * the entry - if an update of the list is necessary.
+	 *
+	 * @param _type either 'update', 'edit', 'delete', 'add' or null
+	 * - update: request just modified data from given rows.  Sorting is not considered,
+	 *		so if the sort field is changed, the row will not be moved.
+	 * - edit: rows changed, but sorting may be affected.  Requires full reload.
+	 * - delete: just delete the given rows clientside (no server interaction neccessary)
+	 * - add: requires full reload for proper sorting
+	 * @param _app application name incl. sub-type eg. "projectmanager-element"
+	 * @param _id id of entry to refresh or null
+	 * @param _data eg. owner or responsible to decide if update is necessary
+	 * @returns {undefined}
+	 */
+	push(_type : string, _app : string, _id : string|number, _data? : any)
+	{
+		console.log('app.timesheet.push', arguments);
+
+		switch (_type)
+		{
+			case 'delete':
+				super.push.apply(this, arguments);
+				break;
+		}
+	}
 }
 
 app.classes.timesheet = TimesheetApp;