diff --git a/calendar/js/app.js b/calendar/js/app.js
index c8430ade25..0c723a6a8e 100644
--- a/calendar/js/app.js
+++ b/calendar/js/app.js
@@ -3551,7 +3551,7 @@ var CalendarApp = /** @class */ (function (_super) {
      */
     CalendarApp.prototype.joinVideoConferenceAction = function (_action, _sender) {
         var data = egw.dataGetUIDdata(_sender[0].id)['data'];
-        return this.joinVideoConference(data['##videoconference']);
+        return this.joinVideoConference(data['##videoconference'], data);
     };
     /**
      * Join a videoconference
@@ -3560,13 +3560,15 @@ var CalendarApp = /** @class */ (function (_super) {
      *
      * @param {string} videoconference
      */
-    CalendarApp.prototype.joinVideoConference = function (videoconference) {
+    CalendarApp.prototype.joinVideoConference = function (videoconference, _data) {
+        var start = new Date(_data.start);
+        var end = new Date(_data.end);
         return egw.json("EGroupware\\Status\\Videoconference\\Call::ajax_genMeetingUrl", [videoconference,
             {
                 name: egw.user('account_fullname'),
                 account_id: egw.user('account_id'),
                 email: egw.user('account_email')
-            }], function (_url) {
+            }, start.getTime() / 1000, end.getTime() / 1000], function (_url) {
             app.status.openCall(_url);
         }).sendRequest();
     };
diff --git a/calendar/js/app.ts b/calendar/js/app.ts
index a0a19fe5fc..e3766b0a99 100644
--- a/calendar/js/app.ts
+++ b/calendar/js/app.ts
@@ -4408,7 +4408,7 @@ class CalendarApp extends EgwApp
 	{
 		let data = egw.dataGetUIDdata(_sender[0].id)['data'];
 
-		return this.joinVideoConference(data['##videoconference']);
+		return this.joinVideoConference(data['##videoconference'], data);
 	}
 
 	/**
@@ -4418,8 +4418,10 @@ class CalendarApp extends EgwApp
 	 *
 	 * @param {string} videoconference
 	 */
-	public joinVideoConference(videoconference)
+	public joinVideoConference(videoconference, _data)
 	{
+		let start = new Date(_data.start);
+		let end = new Date(_data.end);
 		return egw.json(
 			"EGroupware\\Status\\Videoconference\\Call::ajax_genMeetingUrl",
 			[videoconference,
@@ -4427,7 +4429,7 @@ class CalendarApp extends EgwApp
 					name:egw.user('account_fullname'),
 					account_id:egw.user('account_id'),
 					email:egw.user('account_email')
-				}], function(_url){
+				}, start.getTime()/1000, end.getTime()/1000], function(_url){
 				app.status.openCall(_url);
 			}).sendRequest();
 	}