diff --git a/packages/firebase_auth/CHANGELOG.md b/packages/firebase_auth/CHANGELOG.md
index 43ab971b889d..0d55deeffbd2 100644
--- a/packages/firebase_auth/CHANGELOG.md
+++ b/packages/firebase_auth/CHANGELOG.md
@@ -1,3 +1,11 @@
+## 0.13.0
+
+* **Breaking change**: Replace `FirebaseUserMetadata.creationTimestamp` and
+  `FirebaseUserMetadata.lastSignInTimestamp` with `creationTime` and `lastSignInTime`.
+  Previously on iOS `creationTimestamp` and `lastSignInTimestamp` returned in
+  seconds and on Android in milliseconds. Now, both platforms provide values as a
+  `DateTime`.
+
 ## 0.12.0+1
 
 * Fixes iOS sign-in exceptions when `additionalUserInfo` is `nil` or has `nil` fields.
diff --git a/packages/firebase_auth/example/test/firebase_auth.dart b/packages/firebase_auth/example/test/firebase_auth.dart
index a2bd8e8dac22..6acf6e6d9b62 100644
--- a/packages/firebase_auth/example/test/firebase_auth.dart
+++ b/packages/firebase_auth/example/test/firebase_auth.dart
@@ -3,9 +3,10 @@
 // BSD-style license that can be found in the LICENSE file.
 
 import 'dart:async';
+
+import 'package:firebase_auth/firebase_auth.dart';
 import 'package:flutter_driver/driver_extension.dart';
 import 'package:flutter_test/flutter_test.dart';
-import 'package:firebase_auth/firebase_auth.dart';
 
 void main() {
   final Completer<String> completer = Completer<String>();
@@ -22,8 +23,6 @@ void main() {
     test('signInAnonymously', () async {
       final AuthResult result = await auth.signInAnonymously();
       final FirebaseUser user = result.user;
-      expect(user.uid, isNotNull);
-      expect(user.isAnonymous, isTrue);
       final AdditionalUserInfo additionalUserInfo = result.additionalUserInfo;
       expect(additionalUserInfo.username, isNull);
       expect(additionalUserInfo.isNewUser, isNotNull);
@@ -34,6 +33,17 @@ void main() {
           additionalUserInfo.providerId == null ||
               additionalUserInfo.providerId == 'password',
           isTrue);
+      expect(user.uid, isNotNull);
+      expect(user.isAnonymous, isTrue);
+      expect(user.metadata.creationTime.isAfter(DateTime(2018, 1, 1)), isTrue);
+      expect(user.metadata.creationTime.isBefore(DateTime.now()), isTrue);
+      await auth.signOut();
+      final FirebaseUser user2 = (await auth.signInAnonymously()).user;
+      expect(user2.uid, isNot(equals(user.uid)));
+      expect(user2.metadata.creationTime.isBefore(user.metadata.creationTime),
+          isFalse);
+      expect(
+          user2.metadata.lastSignInTime, equals(user2.metadata.creationTime));
     });
 
     test('isSignInWithEmailLink', () async {
diff --git a/packages/firebase_auth/ios/Classes/FirebaseAuthPlugin.m b/packages/firebase_auth/ios/Classes/FirebaseAuthPlugin.m
index 5225d486d468..d6e469393314 100644
--- a/packages/firebase_auth/ios/Classes/FirebaseAuthPlugin.m
+++ b/packages/firebase_auth/ios/Classes/FirebaseAuthPlugin.m
@@ -353,8 +353,8 @@ - (NSMutableDictionary *)dictionaryFromUser:(FIRUser *)user {
     [providerData addObject:toDictionary(userInfo)];
   }
 
-  long creationDate = [user.metadata.creationDate timeIntervalSince1970];
-  long lastSignInDate = [user.metadata.lastSignInDate timeIntervalSince1970];
+  long creationDate = [user.metadata.creationDate timeIntervalSince1970] * 1000;
+  long lastSignInDate = [user.metadata.lastSignInDate timeIntervalSince1970] * 1000;
 
   NSMutableDictionary *userData = [toDictionary(user) mutableCopy];
   userData[@"creationTimestamp"] = [NSNumber numberWithLong:creationDate];
diff --git a/packages/firebase_auth/lib/src/user_metadata.dart b/packages/firebase_auth/lib/src/user_metadata.dart
index 66c1fedf4911..293d294b6ecb 100644
--- a/packages/firebase_auth/lib/src/user_metadata.dart
+++ b/packages/firebase_auth/lib/src/user_metadata.dart
@@ -10,7 +10,13 @@ class FirebaseUserMetadata {
 
   final Map<String, dynamic> _data;
 
-  int get creationTimestamp => _data['creationTimestamp'];
+  /// When this account was created as dictated by the server clock.
+  DateTime get creationTime =>
+      DateTime.fromMillisecondsSinceEpoch(_data['creationTimestamp']);
 
-  int get lastSignInTimestamp => _data['lastSignInTimestamp'];
+  /// When the user last signed in as dictated by the server clock.
+  ///
+  /// This is only accurate up to a granularity of 2 minutes for consecutive sign-in attempts.
+  DateTime get lastSignInTime =>
+      DateTime.fromMillisecondsSinceEpoch(_data['lastSignInTimestamp']);
 }
diff --git a/packages/firebase_auth/pubspec.yaml b/packages/firebase_auth/pubspec.yaml
index f3fd0520aff1..deabd4712be2 100755
--- a/packages/firebase_auth/pubspec.yaml
+++ b/packages/firebase_auth/pubspec.yaml
@@ -4,7 +4,7 @@ description: Flutter plugin for Firebase Auth, enabling Android and iOS
   like Google, Facebook and Twitter.
 author: Flutter Team <flutter-dev@googlegroups.com>
 homepage: https://github.com/flutter/plugins/tree/master/packages/firebase_auth
-version: "0.12.0+1"
+version: 0.13.0
 
 flutter:
   plugin:
diff --git a/packages/firebase_auth/test/firebase_auth_test.dart b/packages/firebase_auth/test/firebase_auth_test.dart
index a05cdec4adec..9acff316492d 100755
--- a/packages/firebase_auth/test/firebase_auth_test.dart
+++ b/packages/firebase_auth/test/firebase_auth_test.dart
@@ -25,15 +25,14 @@ const String kMockPhoneNumber = '5555555555';
 const String kMockVerificationId = '12345';
 const String kMockSmsCode = '123456';
 const String kMockLanguage = 'en';
-const Map<String, dynamic> kMockAdditionalUserInfo = <String, dynamic>{
-  'isNewUser': false,
-  'username': 'flutterUser',
-  'providerId': 'testProvider',
-  'profile': <String, dynamic>{'foo': 'bar'},
-};
-const Map<String, dynamic> kMockUser = <String, dynamic>{
+final int kMockCreationTimestamp = DateTime(2019, 1, 1).millisecondsSinceEpoch;
+final int kMockLastSignInTimestamp =
+    DateTime.now().subtract(const Duration(days: 1)).millisecondsSinceEpoch;
+final Map<String, dynamic> kMockUser = <String, dynamic>{
   'isAnonymous': true,
   'isEmailVerified': false,
+  'creationTimestamp': kMockCreationTimestamp,
+  'lastSignInTimestamp': kMockLastSignInTimestamp,
   'providerData': <Map<String, String>>[
     <String, String>{
       'providerId': kMockProviderId,
@@ -44,6 +43,12 @@ const Map<String, dynamic> kMockUser = <String, dynamic>{
     },
   ],
 };
+const Map<String, dynamic> kMockAdditionalUserInfo = <String, dynamic>{
+  'isNewUser': false,
+  'username': 'flutterUser',
+  'providerId': 'testProvider',
+  'profile': <String, dynamic>{'foo': 'bar'},
+};
 
 void main() {
   group('$FirebaseAuth', () {
@@ -103,6 +108,10 @@ void main() {
       expect(userInfo.displayName, kMockDisplayName);
       expect(userInfo.photoUrl, kMockPhotoUrl);
       expect(userInfo.email, kMockEmail);
+      expect(user.metadata.creationTime.millisecondsSinceEpoch,
+          kMockCreationTimestamp);
+      expect(user.metadata.lastSignInTime.millisecondsSinceEpoch,
+          kMockLastSignInTimestamp);
     }
 
     void verifyAuthResult(AuthResult result) {