diff --git a/application/controllers/api/frontend/v1/Stundenplan.php b/application/controllers/api/frontend/v1/Stundenplan.php
index 5e35ae3c9..5970835c9 100644
--- a/application/controllers/api/frontend/v1/Stundenplan.php
+++ b/application/controllers/api/frontend/v1/Stundenplan.php
@@ -49,11 +49,15 @@ class Stundenplan extends FHCAPI_Controller
 	 */
 	public function roomInformation()
 	{
+
+        
         // storing the get parameter in local variables
         $ort_kurzbz = $this->input->get('ort_kurzbz', TRUE);
         $start_date = $this->input->get('start_date', TRUE);
         $end_date = $this->input->get('end_date', TRUE);
         
+        $this->addMeta("test_start_date",$start_date);
+
         $this->addMeta("ort",$ort_kurzbz);
         $this->addMeta("start date",$start_date);
         $this->addMeta("end date",$end_date);
@@ -67,11 +71,50 @@ class Stundenplan extends FHCAPI_Controller
         }
 
         $result = hasData($result) ? getData($result) : [];
+        
+        // set up the log library and configure the library to log to the db
+        $this->load->library('LogLib');
+        $this->loglib->setConfigs(array(
+			'classIndex' => 5,
+			'functionIndex' => 5,
+			'lineIndex' => 4,
+			'dbLogType' => 'API', // required
+			'dbExecuteUser' => 'RESTful API'
+		));
+
+        /* foreach($result as $event){
+            $this->loglib->logInfoDB($event->datum,"NEW DATE");
+        } */
+
+        $testStartDate = new DateTime($start_date);
+        $this->loglib->logInfoDB($testStartDate->format('Y-m-d'),"php start date");
+        $testStartDate->modify('+1 day');
+        $this->loglib->logInfoDB($testStartDate->format('Y-m-d'),"php start date plus one day");
+        $testStartDate->modify('+1 day');
+        $this->loglib->logInfoDB($testStartDate->format('Y-m-d'),"php start date plus one day");
+        $testStartDate->modify('+1 day');
+        $this->loglib->logInfoDB($testStartDate->format('Y-m-d'),"php start date plus one day");
+        $testStartDate->modify('+1 day');
+        $this->loglib->logInfoDB($testStartDate->format('Y-m-d'),"php start date plus one day");
+        
+        $this->groupTheCalendar($result);
+        //php start date
+        $phpStartDate = new DateTime($start_date);
+
+        //$phpStartDate->modify('+1 day');
+        $this->addMeta('result',$phpStartDate);
+       
+            error_log("test".print_r($result,true));
+        
 		//echo($this->db->last_query());
 		$this->terminateWithSuccess($result);
 		
 	}
 
+    private function groupTheCalendar($data){
+
+    }
+
     public function Stunden()
 	{
 		$this->load->model('ressource/Stunde_model', 'StundeModel');
diff --git a/application/models/ressource/Stundenplan_model.php b/application/models/ressource/Stundenplan_model.php
index 64550ccbf..077201f0f 100755
--- a/application/models/ressource/Stundenplan_model.php
+++ b/application/models/ressource/Stundenplan_model.php
@@ -18,7 +18,7 @@ class Stundenplan_model extends DB_Model
 	 * 
 	 * @return stdClass
 	 */
-	public function getRoomDataOnDay($ort_kurzbz='EDV_A2.06',$start_date='2024-05-21',$end_date='2024-05-21'){
+	public function getRoomDataOnDay($ort_kurzbz='EDV_A2.06',$start_date,$end_date){
 
 
 		$this->addSelect(['*',"CONCAT(UPPER(sp.stg_typ),UPPER(sp.stg_kurzbz),'-',COALESCE(CAST(sp.semester AS varchar),'/'),COALESCE(CAST(sp.verband AS varchar),'/')) as stg","lektor","CONCAT(lehrfach,'-',lehrform) as lv_info" ]);
diff --git a/public/js/apps/Cis/RoomInformation.js b/public/js/apps/Cis/RoomInformation.js
index fbe49386d..6aa590b31 100644
--- a/public/js/apps/Cis/RoomInformation.js
+++ b/public/js/apps/Cis/RoomInformation.js
@@ -17,6 +17,11 @@ const app = Vue.createApp({
         currentDate: function(){
             return new Date(this.calendarWeek.y, this.calendarWeek.m, this.calendarWeek.d);
         },
+    },
+    methods:{
+        calendarDate_to_UTC_date: function(calendarDate){
+            return [calendarDate.y, calendarDate.m, calendarDate.d].join('-');    
+        }
     },
 	created() {
 
@@ -25,6 +30,18 @@ const app = Vue.createApp({
 				this.stunden[std.stunde] = std; // TODO(chris): geht besser
 			});
 
+
+            console.log(this.calendarDate_to_UTC_date(this.calendarWeek.firstDayOfWeek),"this is the converted calendar date")
+
+            /* console.log(this.convertDateToUtcDate(this.calendarWeek.firstDayOfWeek), "iso string here")
+
+            console.log(this.calendarWeek.cdFirstDayOfWeek.y,"this is the year of the first day of the week");
+            console.log(this.calendarWeek.cdFirstDayOfWeek.m,"this is the month of the first day of the week");
+            console.log(this.calendarWeek.cdFirstDayOfWeek.d,"this is the day of the first day of the week");
+
+            console.log(this.calendarWeek.firstDayOfWeek,"this is the first day of the week");
+            console.log(this.convertDateToUtcDate(this.calendarWeek.firstDayOfWeek), "this is the UTC date")
+ */
             this.$fhcApi.factory.stundenplan.getRoomInfo('EDV_A6.09', this.calendarWeek.firstDayOfWeek, this.calendarWeek.lastDayOfWeek).then(res =>{
                 let events;
                 if (res.data && res.data.forEach) {