diff --git a/app/ui/views/chat_list_view.py b/app/ui/views/chat_list_view.py
index c9cd045..9ecf561 100644
--- a/app/ui/views/chat_list_view.py
+++ b/app/ui/views/chat_list_view.py
@@ -178,6 +178,14 @@ class ChatListView(QWidget):
                 is_read = bool(chat.last_message.is_viewed)
 
             item_widget = ChatListItemWidget(companion_name, last_msg, timestamp, unread_count=unread_count, is_outgoing=is_outgoing, is_read=is_read)
+            # Tooltip with full date/time on hover
+            try:
+                if chat.last_message and getattr(chat.last_message, 'created_at', None):
+                    item_widget.set_timestamp_tooltip(chat.last_message.created_at.strftime('%d.%m.%Y %H:%M:%S'))
+                else:
+                    item_widget.set_timestamp_tooltip("")
+            except Exception:
+                pass
             
             # Создаем элемент списка и устанавливаем для него наш виджет
             list_item = QListWidgetItem(self.chat_list)
diff --git a/app/ui/widgets/chat_list_item_widget.py b/app/ui/widgets/chat_list_item_widget.py
index bb3eb15..43d9a03 100644
--- a/app/ui/widgets/chat_list_item_widget.py
+++ b/app/ui/widgets/chat_list_item_widget.py
@@ -120,6 +120,13 @@ class ChatListItemWidget(QWidget):
         self._update_unread_badge_shape()
         self.unread_label.setVisible(self.unread_label.text() != "")
 
+    def set_timestamp_tooltip(self, tooltip_text: str):
+        try:
+            self.timestamp_label.setToolTip(tooltip_text or "")
+        except Exception:
+            # Be defensive if label not yet created
+            pass
+
     def _update_unread_badge_shape(self):
         text = self.unread_label.text()
         if not hasattr(self, "_unread_base_style"):