diff --git a/lib/pages/visitor_password/bloc/visitor_password_bloc.dart b/lib/pages/visitor_password/bloc/visitor_password_bloc.dart
index 6dc20cfd..c5ee3259 100644
--- a/lib/pages/visitor_password/bloc/visitor_password_bloc.dart
+++ b/lib/pages/visitor_password/bloc/visitor_password_bloc.dart
@@ -21,7 +21,6 @@ import 'package:syncrow_web/utils/snack_bar.dart';
 
 class VisitorPasswordBloc
     extends Bloc<VisitorPasswordEvent, VisitorPasswordState> {
-
   VisitorPasswordBloc() : super(VisitorPasswordInitial()) {
     on<SelectUsageFrequency>(selectUsageFrequency);
     on<FetchDevice>(_onFetchDevice);
@@ -87,6 +86,9 @@ class VisitorPasswordBloc
     SelectTimeVisitorPassword event,
     Emitter<VisitorPasswordState> emit,
   ) async {
+    // Ensure expirationTimeTimeStamp has a value
+    effectiveTimeTimeStamp ??= DateTime.now().millisecondsSinceEpoch ~/ 1000;
+
     final DateTime? picked = await showDatePicker(
       context: event.context,
       initialDate: DateTime.now(),
@@ -94,86 +96,124 @@ class VisitorPasswordBloc
       lastDate: DateTime.now().add(const Duration(days: 5095)),
     );
 
-    if (picked != null) {
-      final TimeOfDay? timePicked = await showTimePicker(
-        context: event.context,
-        initialTime: TimeOfDay.now(),
-        builder: (context, child) {
-          return Theme(
-            data: ThemeData.light().copyWith(
-              colorScheme: const ColorScheme.light(
-                primary: ColorsManager.primaryColor,
-                onSurface: Colors.black,
-              ),
-              buttonTheme: const ButtonThemeData(
-                colorScheme: ColorScheme.light(
-                  primary: Colors.green,
-                ),
-              ),
+    if (picked == null) return;
+
+    final TimeOfDay? timePicked = await showTimePicker(
+      context: event.context,
+      initialTime: TimeOfDay.now(),
+      builder: (context, child) {
+        return Theme(
+          data: ThemeData.light().copyWith(
+            colorScheme: const ColorScheme.light(
+              primary: ColorsManager.primaryColor,
+              onSurface: Colors.black,
             ),
-            child: child!,
-          );
-        },
-      );
-
-      if (timePicked != null) {
-        final selectedDateTime = DateTime(
-          picked.year,
-          picked.month,
-          picked.day,
-          timePicked.hour,
-          timePicked.minute,
+          ),
+          child: child!,
         );
+      },
+    );
 
-        final selectedTimestamp =
-            selectedDateTime.millisecondsSinceEpoch ~/ 1000;
+    if (timePicked == null) return;
 
-        if (event.isStart) {
-          if (expirationTimeTimeStamp != null &&
-              selectedTimestamp > expirationTimeTimeStamp!) {
-            CustomSnackBar.displaySnackBar(
+    final selectedDateTime = DateTime(
+      picked.year,
+      picked.month,
+      picked.day,
+      timePicked.hour,
+      timePicked.minute,
+    );
+    final selectedTimestamp = selectedDateTime.millisecondsSinceEpoch ~/ 1000;
+    final currentTimestamp = DateTime.now().millisecondsSinceEpoch ~/ 1000;
+
+    if (event.isStart) {
+      // START TIME VALIDATION
+      if (expirationTimeTimeStamp != null &&
+          selectedTimestamp > expirationTimeTimeStamp!) {
+        await showDialog<void>(
+          context: event.context,
+          builder: (context) => AlertDialog(
+            title: const Text(
               'Effective Time cannot be later than Expiration Time.',
-            );
-            return;
-          }
-          if(selectedTimestamp < DateTime.now().millisecondsSinceEpoch ~/ 1000) {
-            if(selectedTimestamp < DateTime.now().millisecondsSinceEpoch ~/ 1000) {
-              await showDialog<void>(
-                context: event.context,
-                builder: (context) => AlertDialog(
-                  title: const Text('Effective Time cannot be earlier than current time.'),
-                  actionsAlignment: MainAxisAlignment.center,
-                  content: 
-                    FilledButton(
-                      onPressed: () {
-                        Navigator.of(event.context).pop();
-                        add(SelectTimeVisitorPassword(context: event.context, isStart: true, isRepeat: false));
-                      },
-                      child: const Text('OK'),
-                    ),
-                  
-                ),
-              );
-            }
-            return;
-          }
-          effectiveTimeTimeStamp = selectedTimestamp;
-          startTimeAccess = selectedDateTime.toString().split('.').first;
-        } else {
-          if (effectiveTimeTimeStamp != null &&
-              selectedTimestamp < effectiveTimeTimeStamp!) {
-            CustomSnackBar.displaySnackBar(
-              'Expiration Time cannot be earlier than Effective Time.',
-            );
-            return;
-          }
-          expirationTimeTimeStamp = selectedTimestamp;
-          endTimeAccess = selectedDateTime.toString().split('.').first;
-        }
-        emit(ChangeTimeState());
-        emit(VisitorPasswordInitial());
+            ),
+            actionsAlignment: MainAxisAlignment.center,
+            content: FilledButton(
+              onPressed: () {
+                Navigator.of(event.context).pop();
+                add(SelectTimeVisitorPassword(
+                  context: event.context,
+                  isStart: true,
+                  isRepeat: false,
+                ));
+              },
+              child: const Text('OK'),
+            ),
+          ),
+        );
+        return;
       }
+
+      if (selectedTimestamp < currentTimestamp) {
+        await showDialog<void>(
+          context: event.context,
+          builder: (context) => AlertDialog(
+            title: const Text(
+              'Effective Time cannot be earlier than current time.',
+            ),
+            actionsAlignment: MainAxisAlignment.center,
+            content: FilledButton(
+              onPressed: () {
+                Navigator.of(event.context).pop();
+                add(SelectTimeVisitorPassword(
+                  context: event.context,
+                  isStart: true,
+                  isRepeat: false,
+                ));
+              },
+              child: const Text('OK'),
+            ),
+          ),
+        );
+        return;
+      }
+
+      // Save effective time
+      effectiveTimeTimeStamp = selectedTimestamp;
+      startTimeAccess = selectedDateTime.toString().split('.').first;
+    } else {
+      // END TIME VALIDATION
+      if (effectiveTimeTimeStamp != null &&
+          selectedTimestamp < effectiveTimeTimeStamp!) {
+        await showDialog<void>(
+          context: event.context,
+          builder: (context) => AlertDialog(
+            title: const Text(
+              'Expiration Time cannot be earlier than Effective Time.',
+            ),
+            actionsAlignment: MainAxisAlignment.center,
+            content: FilledButton(
+              onPressed: () {
+                Navigator.of(event.context).pop();
+                add(SelectTimeVisitorPassword(
+                  context: event.context,
+                  isStart: false,
+                  isRepeat: false,
+                ));
+              },
+              child: const Text('OK'),
+            ),
+          ),
+        );
+        return;
+      }
+
+      // Save expiration time
+      expirationTimeTimeStamp = selectedTimestamp;
+      endTimeAccess = selectedDateTime.toString().split('.').first;
     }
+
+    emit(ChangeTimeState());
+    emit(VisitorPasswordInitial());
   }
 
   bool toggleRepeat(
@@ -213,7 +253,7 @@ class VisitorPasswordBloc
       FetchDevice event, Emitter<VisitorPasswordState> emit) async {
     try {
       emit(DeviceLoaded());
-         final projectUuid = await ProjectManager.getProjectUUID() ?? '';
+      final projectUuid = await ProjectManager.getProjectUUID() ?? '';
 
       data = await AccessMangApi().fetchDoorLockDeviceList(projectUuid);
       emit(TableLoaded(data));