diff --git a/mycaldav/models.py b/mycaldav/models.py
index 657cde9..f814cf0 100644
--- a/mycaldav/models.py
+++ b/mycaldav/models.py
@@ -46,21 +46,27 @@ class cls_caldav():
         self.day.sort(key=lambda x: x.key, reverse=reverse)
         self.night.sort(key=lambda x: x.key, reverse=reverse)
 
-
-
-    def get_caldav_data(self,periode=1,calendar=None, date=None):
+    def caldav_open_url(self, days_delta, date):
         ctx = ssl.create_default_context()
         ctx.check_hostname = False
         ctx.verify_mode = ssl.CERT_NONE
 
         self.clear_data()
 
-        o_url = urllib.request.urlopen(self.url, context=ctx)
+        modified_url = self.url + f"&start={int((date-timedelta(days=days_delta)).timestamp())}&end={int((date +timedelta(days=days_delta)).timestamp())}&expand=1"
+        print(f"ICS CALL URL = {modified_url}")   
+        o_url = urllib.request.urlopen(modified_url , context=ctx)
         self.data = o_url.read()
         o_url.close()
 
+
+    def get_caldav_data(self,periode=1,calendar=None, date=None):
         if date is None:
-            date = datetime.now()
+           date = datetime.now()
+       
+        self.caldav_open_url(days_delta=periode,date=date)
+
+       
 
         today = (date.year,date.month,date.day)