diff --git a/maternal-app/maternal-app-backend/src/modules/auth/auth.service.ts b/maternal-app/maternal-app-backend/src/modules/auth/auth.service.ts
index b598f51..50d1197 100644
--- a/maternal-app/maternal-app-backend/src/modules/auth/auth.service.ts
+++ b/maternal-app/maternal-app-backend/src/modules/auth/auth.service.ts
@@ -374,10 +374,13 @@ export class AuthService {
     userId: string,
     updateData: {
       name?: string;
+      timezone?: string;
       preferences?: {
         notifications?: boolean;
         emailUpdates?: boolean;
         darkMode?: boolean;
+        measurementUnit?: 'metric' | 'imperial';
+        timeFormat?: '12h' | '24h';
       };
     },
   ): Promise<{ success: boolean; data: any }> {
@@ -403,6 +406,12 @@ export class AuthService {
       this.logger.log(`Updated user.name to: "${user.name}"`);
     }
 
+    // Update timezone if provided
+    if (updateData.timezone !== undefined) {
+      user.timezone = updateData.timezone;
+      this.logger.log(`Updated user.timezone to: "${user.timezone}"`);
+    }
+
     // Update preferences if provided
     if (updateData.preferences !== undefined) {
       user.preferences = updateData.preferences;
@@ -411,7 +420,7 @@ export class AuthService {
 
     const updatedUser = await this.userRepository.save(user);
     this.logger.log(
-      `User saved. Updated name: "${updatedUser.name}", preferences:`,
+      `User saved. Updated name: "${updatedUser.name}", timezone: "${updatedUser.timezone}", preferences:`,
       updatedUser.preferences,
     );
 
@@ -423,6 +432,7 @@ export class AuthService {
         name: updatedUser.name,
         role: 'user',
         locale: updatedUser.locale,
+        timezone: updatedUser.timezone,
         emailVerified: updatedUser.emailVerified,
         preferences: updatedUser.preferences,
       },