diff --git a/app/Models/ProgramAppends.php b/app/Models/ProgramAppends.php
index e0e3d1b..f5476c2 100644
--- a/app/Models/ProgramAppends.php
+++ b/app/Models/ProgramAppends.php
@@ -7,7 +7,6 @@ use Illuminate\Database\Eloquent\Model;
 class ProgramAppends extends Model
 {
     protected $fillable = ["name", "from", "price", "append"];
-    protected $dateFormat = "U";
     public function program(): \Illuminate\Database\Eloquent\Relations\BelongsTo
     {
         return $this->belongsTo(Programs::class, "program_id", "id");
diff --git a/app/Models/ProgramVideos.php b/app/Models/ProgramVideos.php
index feca603..2f64cdb 100644
--- a/app/Models/ProgramVideos.php
+++ b/app/Models/ProgramVideos.php
@@ -9,7 +9,6 @@ use Illuminate\Support\Carbon;
 class ProgramVideos extends Model
 {
     protected $fillable = ["video_bvid", "start_part", "start_time", "stop_part", "stop_time"];
-    protected $dateFormat = 'U';
     public function program(): \Illuminate\Database\Eloquent\Relations\BelongsTo
     {
         return $this->belongsTo(Programs::class, "program_id", "id");
diff --git a/app/Models/Programs.php b/app/Models/Programs.php
index 6f4cb3a..9bb0054 100644
--- a/app/Models/Programs.php
+++ b/app/Models/Programs.php
@@ -7,7 +7,6 @@ use Illuminate\Database\Eloquent\Model;
 class Programs extends Model
 {
     protected $fillable = ["name", "difficulty", "desc"];
-    protected $dateFormat = 'U';
     public function appends(): \Illuminate\Database\Eloquent\Relations\HasMany
     {
         return $this->hasMany(ProgramAppends::class, "program_id", "id")->orderByDesc("is_original")->orderBy("created_at");
diff --git a/app/Models/VideoComments.php b/app/Models/VideoComments.php
index d06017f..c3430bb 100644
--- a/app/Models/VideoComments.php
+++ b/app/Models/VideoComments.php
@@ -6,6 +6,7 @@ use Illuminate\Database\Eloquent\Model;
 
 class VideoComments extends Model
 {
+    protected $dateFormat = 'U';
     public function video(): \Illuminate\Database\Eloquent\Relations\BelongsTo
     {
         return $this->belongsTo(Videos::class, "aid", "id");
diff --git a/app/Models/VideoDanmakus.php b/app/Models/VideoDanmakus.php
index a08225e..41af5ad 100644
--- a/app/Models/VideoDanmakus.php
+++ b/app/Models/VideoDanmakus.php
@@ -7,6 +7,7 @@ use Illuminate\Database\Eloquent\Model;
 class VideoDanmakus extends Model
 {
     protected $table = "video_danmakus";
+    protected $dateFormat = 'U';
     public function video(): \Illuminate\Database\Eloquent\Relations\BelongsTo
     {
         return $this->belongsTo(Videos::class, "video_bvid", "bvid");
diff --git a/app/Models/Videos.php b/app/Models/Videos.php
index 9acfa9d..30220af 100644
--- a/app/Models/Videos.php
+++ b/app/Models/Videos.php
@@ -6,6 +6,7 @@ use Illuminate\Database\Eloquent\Model;
 
 class Videos extends Model
 {
+    protected $dateFormat = 'U';
     public function comments(): \Illuminate\Database\Eloquent\Relations\HasMany
     {
         return $this->hasMany(VideoComments::class, "aid", "id");