diff --git a/app/Http/Controllers/Api/v1/FreenodeController.php b/app/Http/Controllers/Api/v1/FreenodeController.php
index 0f7e52e..c008408 100644
--- a/app/Http/Controllers/Api/v1/FreenodeController.php
+++ b/app/Http/Controllers/Api/v1/FreenodeController.php
@@ -8,6 +8,7 @@
 use App\Services\TomTool\Telegram\Slave as TeleSlave;
 use Illuminate\Support\Str;
 use Illuminate\Support\Facades\File;
+use Carbon\CarbonImmutable;
 
 class FreenodeController extends Controller
 {
@@ -22,7 +23,8 @@ public function filePut(Request $oRequest)
         $sSubSiteCodeShort = $aData["site_code_short"];
         $aRaw = $aData["raw"];
         
-        $sDate   = date('Ymd');
+        // Subscription links use Beijing's calendar day, independently of app.timezone.
+        $sDate = CarbonImmutable::now('Asia/Shanghai')->format('Ymd');
         $sSuffix = "nodes";
         $sRawKey = $sDate . $sSuffix;
         $sUniqueToken = hash_hmac('sha256', $sRawKey, 'wocaonide');
@@ -47,7 +49,7 @@ public function filePut(Request $oRequest)
             }
             
             $sFileSavePath = $sSubSiteCodeShort."/".$sShortToken;
-            $sFileSaveName = date("Ymd")."-".$sClient.$sExtension;
+            $sFileSaveName = $sDate."-".$sClient.$sExtension;
             $sFilePathFull = $sFileSavePath."/".$sFileSaveName;
             
             if (!File::isDirectory($sFileSavePath)) {
diff --git a/docs/maintenance/FREENODE.md b/docs/maintenance/FREENODE.md
new file mode 100644
index 0000000..100c7c9
--- /dev/null
+++ b/docs/maintenance/FREENODE.md
@@ -0,0 +1,21 @@
+# 免费节点订阅接收
+
+Nodehub只负责接收和托管产物；上游生成、内核校验和站点分发见[master01维护正文](/Users/hellcat/Documents/GemCodes/dd.loc/docs/maintenance/FREENODE.md)。项目身份和访问规则见[GemDocs项目档案](/Users/hellcat/Documents/GemDocs/AI版/10-项目/nodehub.md)。
+
+## 订阅日期契约
+
+`POST /api/freenode/file/put`由`Api/v1/FreenodeController::filePut()`接收，参数仍为`site_code_short`和各格式`raw`，接口及链接算法不变。
+
+接收时通过`CarbonImmutable::now('Asia/Shanghai')`确定一次业务日期，目录令牌和所有格式文件名均使用同一日期。应用默认时区仍为UTC，不改整个应用的日期、任务或日志。与master01按北京时间生成的当天链接保持一致；当天首次正常分发前不保证新日期文件已存在。
+
+旧实现用UTC的`date()`，北京时间00:15、06:15两轮会写到前一天目录，直到12:15一轮才产生当天文件。2026-10-21已确认该问题；本次改动仅修复订阅接收日期，不移动历史文件、不复制旧节点伪造未来批次。
+
+## 回归验证
+
+`php vendor/bin/phpunit tests/Feature/FreenodeDateTest.php --do-not-cache-result`在隔离临时目录运行真实接收控制器，模拟北京时间零点前后以及00:15、06:15、12:15同步时刻，核对三种格式的日期、目录、内容以及全局UTC时区保持不变。Telegram被替换为测试对象，不访问网络或真实公开目录。
+
+2026-10-21本机PHP 8.4.1通过5项、35断言。macOS本机使用真实PHP二进制`/usr/local/Cellar/php/8.4.1_1/bin/php`运行，避免Herd包装器导致PHPUnit隔离子进程启动失败。生产部署及验收结果另按实际记录。
+
+## 发布与恢复
+
+通过Git提交、服务端推送仓库，再将线上工作树更新到明确提交。提交只包括控制器、上述测试和本文；保留已有权限及未跟踪文件。部署前在服务器保存旧提交、控制器原字节/权限、工作区状态和当日订阅哈希；回退只还原本次控制器并记录代码版本，不reset整个有并行改动的工作树，不清除公开订阅目录。数据库、环境配置和系统时间不需要改动。
diff --git a/tests/Feature/FreenodeDateTest.php b/tests/Feature/FreenodeDateTest.php
new file mode 100644
index 0000000..369e5e8
--- /dev/null
+++ b/tests/Feature/FreenodeDateTest.php
@@ -0,0 +1,73 @@
+<?php
+
+namespace Tests\Feature;
+
+use App\Http\Controllers\Api\v1\FreenodeController;
+use Carbon\CarbonImmutable;
+use Illuminate\Http\Request;
+use Mockery;
+use PHPUnit\Framework\Attributes\DataProvider;
+use PHPUnit\Framework\Attributes\PreserveGlobalState;
+use PHPUnit\Framework\Attributes\RunInSeparateProcess;
+use Tests\TestCase;
+
+class FreenodeDateTest extends TestCase
+{
+    public static function receivingTimes(): array
+    {
+        return [
+            'before Beijing midnight' => ['2026-10-21T15:59:59Z', '20261021'],
+            'Beijing midnight' => ['2026-10-21T16:00:00Z', '20261022'],
+            'midnight scheduled delivery' => ['2026-10-21T16:15:00Z', '20261022'],
+            'morning scheduled delivery' => ['2026-10-21T22:15:00Z', '20261022'],
+            'noon scheduled delivery' => ['2026-10-22T04:15:00Z', '20261022'],
+        ];
+    }
+
+    #[DataProvider('receivingTimes')]
+    #[RunInSeparateProcess]
+    #[PreserveGlobalState(false)]
+    public function testReceiverWritesAllFormatsUnderBeijingDate(string $instant, string $date): void
+    {
+        $previousDirectory = getcwd();
+        $previousTimezone = date_default_timezone_get();
+        $directory = sys_get_temp_dir().'/nodehub-date-test-'.bin2hex(random_bytes(6));
+        mkdir($directory, 0700);
+
+        // Keep the real controller and filesystem, but never send Telegram in a test.
+        $telegram = Mockery::mock('alias:App\Services\TomTool\Telegram\Slave');
+        $telegram->shouldReceive('log')->once()->andReturnSelf();
+        $telegram->shouldReceive('enableDetail')->with(false)->once()->andReturnSelf();
+        $telegram->shouldReceive('send')->once();
+
+        try {
+            config(['app.timezone' => 'UTC', 'app.is_loc' => true]);
+            date_default_timezone_set('UTC');
+            CarbonImmutable::setTestNow(new CarbonImmutable($instant));
+            chdir($directory);
+            $raw = ['v2ray' => 'fixture-uri', 'clash' => 'fixture-clash', 'singbox' => 'fixture-singbox'];
+            $request = Request::create('/api/freenode/file/put', 'POST', ['site_code_short' => 'cfn', 'raw' => $raw]);
+            $response = (new FreenodeController())->filePut($request);
+
+            self::assertTrue($response->getData(true)['isDone']);
+            $token = substr(hash_hmac('sha256', $date.'nodes', 'wocaonide'), 0, 16);
+            foreach ($raw as $format => $content) {
+                $extension = $format === 'clash' ? '.yaml' : '.txt';
+                self::assertSame($content, file_get_contents($directory.'/cfn/'.$token.'/'.$date.'-'.$format.$extension));
+            }
+            self::assertCount(3, glob($directory.'/cfn/*/*'));
+            self::assertSame('UTC', date_default_timezone_get());
+            self::assertSame('UTC', config('app.timezone'));
+        } finally {
+            CarbonImmutable::setTestNow();
+            date_default_timezone_set($previousTimezone);
+            chdir($previousDirectory);
+            $files = new \RecursiveIteratorIterator(new \RecursiveDirectoryIterator($directory, \FilesystemIterator::SKIP_DOTS), \RecursiveIteratorIterator::CHILD_FIRST);
+            foreach ($files as $file) {
+                $file->isDir() ? rmdir($file->getPathname()) : unlink($file->getPathname());
+            }
+            rmdir($directory);
+            Mockery::close();
+        }
+    }
+}