diff --git a/kursy/templates/calendar.html b/kursy/templates/calendar.html
index 870bc22..83c9708 100644
--- a/kursy/templates/calendar.html
+++ b/kursy/templates/calendar.html
@@ -6,14 +6,14 @@
 {% block extra_js %}
 <script src="https://cdn.jsdelivr.net/npm/fullcalendar@6.1.20/index.global.min.js" integrity="sha256-sQEgS6I+FEeOlX4oTVi7qW/HMRAh0O6vifpeZXIMRsg=" crossorigin="anonymous"></script>
 <script>
-  function showModal(eventId) {
+  function showModal(occurrenceId) {
     // get event's url
-    const eventApiUrl = `/api/calendar/events/${eventId}`;
+    const eventApiUrl = `/api/calendar/occurrences/${occurrenceId}`;
 
     const eventApi = fetch(eventApiUrl)
       .then(response => response.json())
       .then(data => {
-        eventUrl = data.url;
+        eventUrl = `/occurrence/${occurrenceId}/`;
 
         const modal = document.createElement('div');
         modal.classList.add('fixed', 'inset-0', 'flex', 'items-center', 'justify-center', 'z-50', 'shadow-lg', 'overflow-auto');
@@ -41,7 +41,7 @@
             if (e.target === modal) {
               document.body.removeChild(modal);
 
-              // remove ?modal=eventId from the url
+              // remove ?modal=occurrenceId from the url
               const url = new URL(window.location);
               url.searchParams.delete('modal');
               window.history.pushState({}, '', url);
@@ -55,7 +55,7 @@
                 document.body.removeChild(modal);
               }
               document.removeEventListener('keydown', escHandler);
-              // remove ?modal=eventId from the url
+              // remove ?modal=occurrenceId from the url
               const url = new URL(window.location);
               url.searchParams.delete('modal');
               window.history.pushState({}, '', url);
@@ -69,16 +69,16 @@
             if (document.body.contains(modal)) {
               document.body.removeChild(modal);
             }
-            // remove ?modal=eventId from the url
+            // remove ?modal=occurrenceId from the url
             const url = new URL(window.location);
             url.searchParams.delete('modal');
             window.history.pushState({}, '', url);
           });
           modal.appendChild(closeButton);
 
-          // add ?modal=eventId to the url
+          // add ?modal=occurrenceId to the url
           const url = new URL(window.location);
-          url.searchParams.set('modal', eventId);
+          url.searchParams.set('modal', occurrenceId);
           window.history.pushState({}, '', url);
         }
         return data;
@@ -121,7 +121,7 @@
         right: 'timeGridWeek,listMonth',
       },
       locale: "{% get_current_language as LANGUAGE_CODE %}{{ LANGUAGE_CODE }}",
-      events: "/api/calendar/events/",
+      events: "/api/calendar/occurrences/",
       eventClick: function(info) {
         // prevent default navigation
         info.jsEvent.preventDefault();