fix timestamp bug windows

flask_admin/contrib/fileadmin/__init__.py

@@ -827,7 +827,7 @@ class BaseFileAdmin(BaseView, ActionsMixin):
             # Sort by type
             items.sort(key=itemgetter(2), reverse=True)
             # Sort by modified date
-            items.sort(key=lambda x: (x[0], x[1], x[2], x[3], datetime.fromtimestamp(x[4])), reverse=True)
+            items.sort(key=lambda x: (x[0], x[1], x[2], x[3], datetime.utcfromtimestamp(x[4])), reverse=True)
         else:
             column_index = self.possible_columns.index(sort_column)
             items.sort(key=itemgetter(column_index), reverse=sort_desc)