diff --git a/app/Models/Badge.php b/app/Models/Badge.php
index d6bc32b..3764a41 100644
--- a/app/Models/Badge.php
+++ b/app/Models/Badge.php
@@ -9,6 +9,8 @@ class Badge extends Model
 {
     use HasFactory;
 
+    protected $dateFormat = 'Y-m-d H:i:s.u';
+
     protected $guarded = ['id', 'created_at', 'updated_at'];
 
     public function users()
diff --git a/app/Models/Config.php b/app/Models/Config.php
index b6e278a..83623b4 100644
--- a/app/Models/Config.php
+++ b/app/Models/Config.php
@@ -9,6 +9,8 @@ class Config extends Model
 {
     use HasFactory;
 
+    protected $dateFormat = 'Y-m-d H:i:s.u';
+
     protected $fillable = [
         'type',
         'data'
diff --git a/app/Models/File.php b/app/Models/File.php
index d7212dd..6fc6775 100644
--- a/app/Models/File.php
+++ b/app/Models/File.php
@@ -10,6 +10,9 @@ class File extends Model
 {
     use HasFactory;
 
+
+    protected $dateFormat = 'Y-m-d H:i:s.u';
+
     protected $fillable = [
         'user_id',
         'storage',
diff --git a/app/Models/Log.php b/app/Models/Log.php
index e8fc464..c470720 100644
--- a/app/Models/Log.php
+++ b/app/Models/Log.php
@@ -10,6 +10,9 @@ class Log extends Model
 {
     use HasFactory;
 
+
+    protected $dateFormat = 'Y-m-d H:i:s.u';
+
     protected $fillable = [
         'type',
         'user_id',
diff --git a/app/Models/Mission.php b/app/Models/Mission.php
index dc2127c..acbf320 100644
--- a/app/Models/Mission.php
+++ b/app/Models/Mission.php
@@ -17,6 +17,9 @@ class Mission extends Model
      *
      * @var string[]
      */
+
+    protected $dateFormat = 'Y-m-d H:i:s.u';
+
     protected $fillable = [
         'user_id',
         'survey_id',
diff --git a/app/Models/Survey.php b/app/Models/Survey.php
index 65f61c9..39e9938 100644
--- a/app/Models/Survey.php
+++ b/app/Models/Survey.php
@@ -15,6 +15,9 @@ class Survey extends Model
      *
      * @var array
      */
+
+    protected $dateFormat = 'Y-m-d H:i:s.u';
+
     protected $fillable = ['name', 'settings', 'user_id'];
 
     /**
diff --git a/app/Models/SurveyAnswer.php b/app/Models/SurveyAnswer.php
index 70f55e3..8748178 100644
--- a/app/Models/SurveyAnswer.php
+++ b/app/Models/SurveyAnswer.php
@@ -15,6 +15,9 @@ class SurveyAnswer extends Model
      *
      * @var array
      */
+
+    protected $dateFormat = 'Y-m-d H:i:s.u';
+
     protected $fillable = ['value', 'survey_question_id', 'survey_entry_id'];
 
     /**
diff --git a/app/Models/SurveyEntry.php b/app/Models/SurveyEntry.php
index da55270..e1fe5fb 100644
--- a/app/Models/SurveyEntry.php
+++ b/app/Models/SurveyEntry.php
@@ -16,6 +16,9 @@ class SurveyEntry extends Model
      *
      * @var array
      */
+
+    protected $dateFormat = 'Y-m-d H:i:s.u';
+
     protected $fillable = ['survey_id', 'participant_id'];
 
     protected $casts = [
diff --git a/app/Models/SurveyQuestion.php b/app/Models/SurveyQuestion.php
index ea29730..ff70d96 100644
--- a/app/Models/SurveyQuestion.php
+++ b/app/Models/SurveyQuestion.php
@@ -16,6 +16,9 @@ class SurveyQuestion extends Model
      *
      * @var array
      */
+
+    protected $dateFormat = 'Y-m-d H:i:s.u';
+
     protected $fillable = ['type', 'options', 'title', 'content', 'rules', 'survey_id', 'survey_section_id'];
 
     protected $casts = [
diff --git a/app/Models/SurveySection.php b/app/Models/SurveySection.php
index 2e7ce91..d4446c6 100644
--- a/app/Models/SurveySection.php
+++ b/app/Models/SurveySection.php
@@ -15,6 +15,9 @@ class SurveySection extends Model
      *
      * @var array
      */
+
+    protected $dateFormat = 'Y-m-d H:i:s.u';
+
     protected $fillable = ['name', 'description'];
 
     /**
diff --git a/app/Models/Updater.php b/app/Models/Updater.php
index 1b8e845..10fef49 100644
--- a/app/Models/Updater.php
+++ b/app/Models/Updater.php
@@ -15,6 +15,9 @@ class Updater extends Model
      *
      * @var string[]
      */
+
+    protected $dateFormat = 'Y-m-d H:i:s.u';
+
     protected $fillable = [
         'user_id',
         'version',
diff --git a/app/Models/User.php b/app/Models/User.php
index 61cd9ca..b2cf733 100644
--- a/app/Models/User.php
+++ b/app/Models/User.php
@@ -22,6 +22,9 @@ class User extends Authenticatable implements BannableContract
      *
      * @var array<int, string>
      */
+
+    protected $dateFormat = 'Y-m-d H:i:s.u';
+
     protected $fillable = [
         'name',
         'email',
diff --git a/app/Models/UserAccount.php b/app/Models/UserAccount.php
index 9fc2c87..1cbd4be 100644
--- a/app/Models/UserAccount.php
+++ b/app/Models/UserAccount.php
@@ -15,6 +15,9 @@ class UserAccount extends Model
      *
      * @var array<int, string>
      */
+
+    protected $dateFormat = 'Y-m-d H:i:s.u';
+
     protected $fillable = [
         'user_id',
         'provider',
diff --git a/app/Models/UserBadge.php b/app/Models/UserBadge.php
index a6afa2c..16a8000 100644
--- a/app/Models/UserBadge.php
+++ b/app/Models/UserBadge.php
@@ -15,6 +15,9 @@ class UserBadge extends Model
         'badge_id'
     ];
 
+
+    protected $dateFormat = 'Y-m-d H:i:s.u';
+
     protected $casts = [
         'created_at' => 'datetime',
         'updated_at' => 'datetime'
diff --git a/app/Models/UserMission.php b/app/Models/UserMission.php
index 098f8d9..7eee6c7 100644
--- a/app/Models/UserMission.php
+++ b/app/Models/UserMission.php
@@ -10,6 +10,9 @@ class UserMission extends Model
 {
     use HasFactory;
 
+
+    protected $dateFormat = 'Y-m-d H:i:s.u';
+
     protected $fillable = [
         'user_id',
         'mission_id',
diff --git a/app/Models/UserRecord.php b/app/Models/UserRecord.php
index 9683c97..4d4d8b2 100644
--- a/app/Models/UserRecord.php
+++ b/app/Models/UserRecord.php
@@ -10,6 +10,9 @@ class UserRecord extends Model
 {
     use HasFactory;
 
+
+    protected $dateFormat = 'Y-m-d H:i:s.u';
+
     protected $fillable = [
         'user_id',
         'recorder_id',