diff --git a/app/Console/Commands/CheckBirthday.php b/app/Console/Commands/CheckBirthday.php
index 265885b..0f8c4af 100755
--- a/app/Console/Commands/CheckBirthday.php
+++ b/app/Console/Commands/CheckBirthday.php
@@ -44,14 +44,13 @@ class CheckBirthday extends Command
      */
     public function handle()
     {
-        // 匹配今天生日（格式：YYYY-MM-DD 或 MM-DD）
-        $today = date('m-d');
+        // 仅完整生日（YYYY-MM-DD）参与提醒，避免 YYYY-MM 被自动补成 01 误判
         $users = User::where('is_schoolmate', 1)
-            ->where(function ($query) use ($today) {
-                $query->where('birthday', 'like', '%-' . $today)
-                    ->orWhere('birthday', 'like', $today . '%');
-            })
+            ->whereNotNull('birthday')
             ->get();
+        $users = $users->filter(function ($user) {
+            return User::isBirthdayToday($user->birthday);
+        })->values();
 
         $birthdayCount = $users->count();
 
diff --git a/app/Console/Commands/NormalizeUserBirthdayMonth.php b/app/Console/Commands/NormalizeUserBirthdayMonth.php
new file mode 100644
index 0000000..9caa256
--- /dev/null
+++ b/app/Console/Commands/NormalizeUserBirthdayMonth.php
@@ -0,0 +1,78 @@
+<?php
+
+namespace App\Console\Commands;
+
+use App\Models\User;
+use Illuminate\Console\Command;
+
+class NormalizeUserBirthdayMonth extends Command
+{
+    /**
+     * The name and signature of the console command.
+     *
+     * @var string
+     */
+    protected $signature = 'users:normalize-birthday-month {--dry-run : 仅预览将被修复的数据，不实际写库}';
+
+    /**
+     * The console command description.
+     *
+     * @var string
+     */
+    protected $description = '将用户表中形如 YYYY-MM-01 的生日还原为 YYYY-MM';
+
+    /**
+     * Execute the console command.
+     *
+     * @return int
+     */
+    public function handle()
+    {
+        $dryRun = (bool) $this->option('dry-run');
+        $query = User::query()
+            ->whereNotNull('birthday')
+            ->where('birthday', 'like', '____-__-01');
+
+        $total = (clone $query)->count();
+
+        if ($total === 0) {
+            $this->info('未找到需要修复的生日数据');
+            return self::SUCCESS;
+        }
+
+        $this->info(($dryRun ? '预览' : '开始修复') . " {$total} 条生日数据");
+
+        $updated = 0;
+        $previewed = 0;
+
+        $query->orderBy('id')->chunkById(200, function ($users) use ($dryRun, &$updated, &$previewed) {
+            foreach ($users as $user) {
+                $normalizedBirthday = substr($user->birthday, 0, 7);
+
+                if ($dryRun) {
+                    if ($previewed < 20) {
+                        $this->line("user_id={$user->id} {$user->birthday} => {$normalizedBirthday}");
+                    }
+                    $previewed++;
+                    continue;
+                }
+
+                $user->birthday = $normalizedBirthday;
+                $user->save();
+                $updated++;
+            }
+        });
+
+        if ($dryRun) {
+            if ($previewed > 20) {
+                $this->line('仅展示前 20 条预览结果');
+            }
+            $this->info("预览完成，共 {$total} 条待修复");
+            return self::SUCCESS;
+        }
+
+        $this->info("修复完成，共更新 {$updated} 条生日数据");
+
+        return self::SUCCESS;
+    }
+}
diff --git a/app/Http/Controllers/Mobile/UserController.php b/app/Http/Controllers/Mobile/UserController.php
index dbf3b0d..fd2fff0 100755
--- a/app/Http/Controllers/Mobile/UserController.php
+++ b/app/Http/Controllers/Mobile/UserController.php
@@ -279,7 +279,7 @@ class UserController extends CommonController
         })->where('id', $this->getUserId())->count();
         //  是否生日
         $is_birthday = 0;
-        if (isset($user->birthday) && date('m-d', strtotime($user->birthday)) == date('m-d')) {
+        if (User::isBirthdayToday($user->birthday ?? null)) {
             $is_birthday = 1;
         }
         return $this->success(compact('user', 'door_appointments', 'course_signs', 'enter_schoolmate', 'is_birthday'));
diff --git a/app/Models/User.php b/app/Models/User.php
index f0266a4..c58001a 100755
--- a/app/Models/User.php
+++ b/app/Models/User.php
@@ -125,6 +125,26 @@ class User extends Authenticatable implements Auditable
         'is_schoolmate' => ['否', '是'],
     ];
 
+    public static function hasCompleteBirthday(?string $birthday): bool
+    {
+        if (empty($birthday) || !preg_match('/^\d{4}-\d{2}-\d{2}$/', $birthday)) {
+            return false;
+        }
+
+        [$year, $month, $day] = array_map('intval', explode('-', $birthday));
+
+        return checkdate($month, $day, $year);
+    }
+
+    public static function isBirthdayToday(?string $birthday): bool
+    {
+        if (!self::hasCompleteBirthday($birthday)) {
+            return false;
+        }
+
+        return substr($birthday, 5, 5) === date('m-d');
+    }
+
     public function getMobileAttribute($value)
     {
         // 如果url中包含admin字符串，则所有的手机号显示中间4位星号代替
diff --git a/database/migrations/2026_04_02_094504_change_users_birthday_back_to_string.php b/database/migrations/2026_04_02_094504_change_users_birthday_back_to_string.php
new file mode 100644
index 0000000..429bcfe
--- /dev/null
+++ b/database/migrations/2026_04_02_094504_change_users_birthday_back_to_string.php
@@ -0,0 +1,31 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration {
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::table('users', function (Blueprint $table) {
+            $table->string('birthday')->nullable()->comment('生日')->change();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::table('users', function (Blueprint $table) {
+            $table->date('birthday')->nullable()->comment('生日')->change();
+        });
+    }
+};