diff --git a/client/src/components/events/EventsList.js b/client/src/components/events/EventsList.js
index d9bc9f8..1b00a29 100644
--- a/client/src/components/events/EventsList.js
+++ b/client/src/components/events/EventsList.js
@@ -103,36 +103,20 @@ const EventsList = () => {
     return roles.includes('driver') || permissions.includes('isdriver');
   };
 
-  // Default sort: 1) driver name ascending, 2) start time early to late, 3) address ascending, 4) language (empty first)
+  // Default sort: appointment time early to late
   const applyDefaultSort = (eventsArray) => {
     return [...eventsArray].sort((a, b) => {
-      // 1. First sort by driver (transportation) name ascending
-      const driverA = (a.transportation || '').toLowerCase();
-      const driverB = (b.transportation || '').toLowerCase();
-      if (driverA !== driverB) {
-        return driverA.localeCompare(driverB);
-      }
-      
-      // 2. Then sort by start time (early to late)
+      // Sort by start time (early to late)
       const timeA = a.start_time ? new Date(a.start_time).getTime() : 0;
       const timeB = b.start_time ? new Date(b.start_time).getTime() : 0;
       if (timeA !== timeB) {
         return timeA - timeB;
       }
-      
-      // 3. Then sort by resource address ascending
-      const addressA = (a.address || '').toLowerCase();
-      const addressB = (b.address || '').toLowerCase();
-      if (addressA !== addressB) {
-        return addressA.localeCompare(addressB);
-      }
-      
-      // 4. Finally sort by language (empty values first, then values with content)
-      const langA = (a.translation || '').trim();
-      const langB = (b.translation || '').trim();
-      if (langA === '' && langB !== '') return -1; // Empty comes first
-      if (langA !== '' && langB === '') return 1;  // Empty comes first
-      return langA.localeCompare(langB); // Both empty or both have values - sort alphabetically
+
+      // Stable fallback sort by customer name
+      const customerA = (a.customer || '').toLowerCase();
+      const customerB = (b.customer || '').toLowerCase();
+      return customerA.localeCompare(customerB);
     });
   };
 
@@ -180,7 +164,7 @@ const EventsList = () => {
           return item;
         }).filter(item => item.type === 'medical' && item.confirmed);
         
-        // Apply default sort (driver name → start time → address)
+        // Apply default sort (appointment time early first)
         const sortedEvents = applyDefaultSort(processedEvents);
         setEvents(sortedEvents);
         setTransportationOptionsList(data.data.filter((item) => item.type === 'transportation' && item.status === 'active'))
@@ -191,7 +175,6 @@ const EventsList = () => {
 
 
   // Apply multi-column sorting
-  // After all custom sorting rules, always sort by language (empty first)
   const applyMultiColumnSort = (eventsArray, rules) => {
     if (rules.length === 0) {
       return applyDefaultSort(eventsArray);
@@ -209,12 +192,10 @@ const EventsList = () => {
         }
       }
       
-      // After all rules, always sort by language (empty values first, then values with content)
-      const langA = (a.translation || '').trim();
-      const langB = (b.translation || '').trim();
-      if (langA === '' && langB !== '') return -1; // Empty comes first
-      if (langA !== '' && langB === '') return 1;  // Empty comes first
-      return langA.localeCompare(langB); // Both empty or both have values - sort alphabetically
+      // Stable fallback sort by appointment time ascending
+      const timeA = a.start_time ? new Date(a.start_time).getTime() : 0;
+      const timeB = b.start_time ? new Date(b.start_time).getTime() : 0;
+      return timeA - timeB;
     });
   };
 
diff --git a/client/src/components/events/EventsMultipleList.js b/client/src/components/events/EventsMultipleList.js
index c700daf..931f557 100644
--- a/client/src/components/events/EventsMultipleList.js
+++ b/client/src/components/events/EventsMultipleList.js
@@ -12,7 +12,7 @@ const EventsMultipleList = () => {
   const navigate = useNavigate();
   const [events, setEvents] = useState([]);
   const [customers, setCustomers] = useState([]);
-  const [sorting, setSorting] = useState({key: '', order: ''});
+  const [sorting, setSorting] = useState({key: 'appointment_time', order: 'asc'});
   const [selectedItems, setSelectedItems] = useState([]);
   const [resources, setResources] = useState([]);
   const [fromDate, setFromDate] = useState(new Date());
@@ -170,6 +170,21 @@ const EventsMultipleList = () => {
     return currentCustomer?.disability || event?.data?.disability?.toLowerCase() === 'yes' || false;
   };
 
+  const sortEventsByKey = (eventsList = [], key = '', order = 'asc') => {
+    if (!key) return [...eventsList];
+    const sorted = [...eventsList].sort((a, b) => {
+      if (key === 'appointment_time') {
+        const aTime = a?.start_time ? new Date(a.start_time).getTime() : 0;
+        const bTime = b?.start_time ? new Date(b.start_time).getTime() : 0;
+        return aTime - bTime;
+      }
+      const aValue = `${a?.[key] || ''}`.toLowerCase();
+      const bValue = `${b?.[key] || ''}`.toLowerCase();
+      return aValue.localeCompare(bValue);
+    });
+    return order === 'desc' ? sorted.reverse() : sorted;
+  };
+
   useEffect(() => {
     if (!AuthService.canViewMedicalEvents()) {
       window.alert('You haven\'t login yet OR this user does not have access to this page. Please change an admin account to login.')
@@ -187,7 +202,7 @@ const EventsMultipleList = () => {
   useEffect(() => {
     if (fromDate && toDate && customers?.length > 0 && resources?.length > 0) {
       EventsService.getAllEvents({ from: EventsService.formatDate(fromDate), to: EventsService.formatDate(toDate) }).then((data) => {
-        setEvents(data.data.filter((item) => {
+        const nextEvents = data.data.filter((item) => {
           const currentCustomer = customers.find(c => c.id === item?.data?.customer) || customers?.find(c => c?.name === item?.data?.client_name || c?.name === item?.target_name);
           const currentResource = resources.find(r => r.id === item?.data?.resource);
           const customerName = item?.data?.customer ? (currentCustomer?.name || item?.data?.client_name || '') : (item?.data?.client_name || '');
@@ -231,7 +246,8 @@ const EventsMultipleList = () => {
           item.eyes_on = checkDisability(customers, item) ? 'Yes' : 'No';
           item.dob = item?.data?.customer ? customers.find(c => c.id === item?.data?.customer)?.birth_date : (item?.data?.client_birth_date || '')
           return item;
-        }).filter(item => item.type === 'medical'));
+        }).filter(item => item.type === 'medical');
+        setEvents(sortEventsByKey(nextEvents, sorting?.key || 'appointment_time', sorting?.order || 'asc'));
       })
     }
   }, [fromDate, toDate, customers, resources]);
@@ -270,20 +286,14 @@ const EventsMultipleList = () => {
 
 
   useEffect(() => {
-    const newEvents = [...events];
-    const sortedEvents = sorting.key === '' ? newEvents : newEvents.sort((a, b) => {
-      return a[sorting.key]?.localeCompare(b[sorting.key]);
-    });
-    setEvents(
-      sorting.order === 'asc' ? sortedEvents : sortedEvents.reverse()
-    )
+    setEvents((prevEvents) => sortEventsByKey(prevEvents, sorting.key, sorting.order || 'asc'));
   }, [sorting]);
 
   const confirmEvent = (id) => {
     if (!AuthService.canEditMedicalEvents()) return;
     EventsService.updateEvent(id, {confirmed: true}).then(() => {
       EventsService.getAllEvents({ from: EventsService.formatDate(fromDate), to: EventsService.formatDate(toDate) }).then((data) => {
-        setEvents(data.data.filter((item) => {
+        const nextEvents = data.data.filter((item) => {
           const currentCustomer = customers.find(c => c.id === item?.data?.customer) || customers?.find(c => c?.name === item?.data?.client_name || c?.name === item?.target_name);
           const currentResource = resources.find(r => r.id === item?.data?.resource);
           const customerName = item?.data?.customer ? (currentCustomer?.name || item?.data?.client_name || '') : (item?.data?.client_name || '');
@@ -327,7 +337,8 @@ const EventsMultipleList = () => {
           item.chinese_name = item?.data?.customer ? customers.find(c => c.id === item?.data?.customer)?.name_cn : (customers?.find(c=> c?.name === item?.data?.client_name || c?.name === item?.target_name )?.name_cn || '');
           item.dob = item?.data?.customer ? customers.find(c => c.id === item?.data?.customer)?.birth_date : (item?.data?.client_birth_date || '')
           return item;
-        }).filter(item => item.type === 'medical'));
+        }).filter(item => item.type === 'medical');
+        setEvents(sortEventsByKey(nextEvents, sorting?.key || 'appointment_time', sorting?.order || 'asc'));
       })
     });
   }