diff --git a/apps/schoolCalendar/custom.html b/apps/schoolCalendar/custom.html
index 5353e4bf0..7a60af319 100644
--- a/apps/schoolCalendar/custom.html
+++ b/apps/schoolCalendar/custom.html
@@ -73,6 +73,25 @@
       
         // When the 'upload' button is clicked...
         document.getElementById("upload").addEventListener("click", function () {
+            //Cacultate data:
+            var calendarEvents = calendar.getEvents();
+            let schedule = []
+            //--------------------
+            if(calendarEvents)
+              for(i=0;i>calendarEvents.length;i++){
+                var calendarEntry = {}
+                calendarEntry['cn'] = calendarEvents[i].title;
+                calendarEntry['dow'] = calendarEvents[i].start.getDate();
+                calendarEntry['sh'] = calendarEvents[i].start.getHours();
+                calendarEntry['sm'] = calendarEvents[i].start.getMinutes();
+                calendarEntry['eh'] = calendarEvents[i].end.getHours();
+                calendarEntry['em'] = calendarEvents[i].end.getMinutes();
+                schedule.push(calendarEntry)
+              }
+          }else{
+             alert("Add some events!");                                               
+          }
+          //---------------------
             // build the app's text using a templated String
             var app = `
 require("Font8x12").add(Graphics);