diff --git a/BACKEND/database/migrations/2025_05_07_062606_add_day_work_special_category.php b/BACKEND/database/migrations/2025_05_07_062606_add_day_work_special_category.php
new file mode 100644
index 0000000..c73131d
--- /dev/null
+++ b/BACKEND/database/migrations/2025_05_07_062606_add_day_work_special_category.php
@@ -0,0 +1,40 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+use Illuminate\Support\Facades\DB;
+
+class AddDayWorkSpecialCategory extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        DB::table('categories')->insert([
+            'c_code' => '17-05-2025',
+            'c_name' => 'Ngày làm việc đặc biệt',
+            'c_type' => 'DAY_WORK_SPECIAL',
+            'c_value' => '2025',
+            'c_active' => 1,
+            'created_at' => now(),
+            'updated_at' => now(),
+        ]);
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        DB::table('categories')
+            ->where('c_code', '17-05-2025')
+            ->where('c_type', 'DAY_WORK_SPECIAL')
+            ->delete();
+    }
+}