diff --git a/nonebot_bison/platform/arknights.py b/nonebot_bison/platform/arknights.py
index a3f788c..5fb28a9 100644
--- a/nonebot_bison/platform/arknights.py
+++ b/nonebot_bison/platform/arknights.py
@@ -82,7 +82,11 @@ class Arknights(NewMessage):
         return post.cid
 
     def get_date(self, post: BulletinListItem) -> Any:
-        return post.updated_at
+        # 为什么不使用post.updated_at？
+        # update_at的时间是上传鹰角服务器的时间，而不是公告发布的时间
+        # 也就是说鹰角可能会在中午就把晚上的公告上传到服务器，但晚上公告才会显示，但是update_at就是中午的时间不会改变
+        # 如果指定了get_date，那么get_date会被优先使用, 并在获取到的值超过2小时时忽略这条post，导致其不会被发送
+        return None
 
     def get_category(self, _) -> Category:
         return Category(1)
diff --git a/tests/platforms/test_arknights.py b/tests/platforms/test_arknights.py
index 153aa69..c33c120 100644
--- a/tests/platforms/test_arknights.py
+++ b/tests/platforms/test_arknights.py
@@ -41,6 +41,27 @@ def monster_siren_list_1():
     return get_json("monster-siren_list_1.json")
 
 
+@pytest.mark.asyncio()
+async def test_get_date_in_bulletin(app: App):
+    from nonebot_bison.utils import ProcessContext
+    from nonebot_bison.platform.arknights import Arknights, BulletinListItem
+
+    arknights = Arknights(ProcessContext(), AsyncClient())
+    assert (
+        arknights.get_date(
+            BulletinListItem(
+                cid="1",
+                title="",
+                category=1,
+                displayTime="",
+                updatedAt=1627036800,
+                sticky=False,
+            )
+        )
+        is None
+    )
+
+
 @pytest.mark.asyncio()
 @respx.mock
 async def test_fetch_new(