--- a/src/eric7/WebBrowser/Session/SessionManagerDialog.py	Sun Sep 03 17:35:15 2023 +0200
+++ b/src/eric7/WebBrowser/Session/SessionManagerDialog.py	Mon Sep 04 17:58:15 2023 +0200
@@ -69,7 +69,8 @@
                 itm.setText(
                     1,
                     datetime.datetime.fromtimestamp(
-                        pathlib.Path(session.filePath).stat().st_mtime
+                        pathlib.Path(session.filePath).stat().st_mtime,
+                        tz=datetime.timezone.utc,
                     ).isoformat(sep=" ", timespec="minutes"),
                 )
                 itm.setData(0, SessionManagerDialog.SessionFileRole, session.filePath)