diff --git a/lib/data/dto/game.dart b/lib/data/dto/game.dart
index c84779d..b8ebf5c 100644
--- a/lib/data/dto/game.dart
+++ b/lib/data/dto/game.dart
@@ -8,14 +8,17 @@ class Game {
   final List<Player>? players;
   final Group? group;
   final String winner;
+  final DateTime createdAt;
 
   Game({
     String? id,
+    DateTime? createdAt,
     required this.name,
     this.players,
     this.group,
     this.winner = '',
-  }) : id = id ?? const Uuid().v4();
+  }) : id = id ?? const Uuid().v4(),
+       createdAt = createdAt ?? DateTime.now();
 
   @override
   String toString() {
diff --git a/lib/data/dto/group.dart b/lib/data/dto/group.dart
index 0420477..6a27de1 100644
--- a/lib/data/dto/group.dart
+++ b/lib/data/dto/group.dart
@@ -5,9 +5,15 @@ class Group {
   final String id;
   final String name;
   final List<Player> members;
+  final DateTime createdAt;
 
-  Group({String? id, required this.name, required this.members})
-    : id = id ?? const Uuid().v4();
+  Group({
+    String? id,
+    DateTime? createdAt,
+    required this.name,
+    required this.members,
+  }) : id = id ?? const Uuid().v4(),
+       createdAt = createdAt ?? DateTime.now();
 
   @override
   String toString() {
diff --git a/lib/data/dto/player.dart b/lib/data/dto/player.dart
index 1b00c2c..5cbceef 100644
--- a/lib/data/dto/player.dart
+++ b/lib/data/dto/player.dart
@@ -3,8 +3,11 @@ import 'package:uuid/uuid.dart';
 class Player {
   final String id;
   final String name;
+  final DateTime createdAt;
 
-  Player({String? id, required this.name}) : id = id ?? const Uuid().v4();
+  Player({String? id, DateTime? createdAt, required this.name})
+    : id = id ?? const Uuid().v4(),
+      createdAt = createdAt ?? DateTime.now();
 
   @override
   String toString() {