diff --git a/.env.example b/.env.example
index dfae5f3..98f3b25 100644
--- a/.env.example
+++ b/.env.example
@@ -1,5 +1,5 @@
 # ===== 通用 =====
-TZ=Asia/Hong_Kong
+TZ=Asia/Shanghai
 LOG_LEVEL=INFO
 
 # ===== 数据库 =====
diff --git a/backend/app/config.py b/backend/app/config.py
index 4bff1d4..b9eb9dc 100644
--- a/backend/app/config.py
+++ b/backend/app/config.py
@@ -17,7 +17,7 @@ class Settings(BaseSettings):
     )
 
     # ===== 通用 =====
-    tz: str = "Asia/Hong_Kong"
+    tz: str = "Asia/Shanghai"
     log_level: str = "INFO"
 
     # ===== 数据库 =====