diff --git a/borg/archive.py b/borg/archive.py
index ab7ff199e..0b977b561 100644
--- a/borg/archive.py
+++ b/borg/archive.py
@@ -128,7 +128,7 @@ class Archive:
     def __init__(self, repository, key, manifest, name, cache=None, create=False,
                  checkpoint_interval=300, numeric_owner=False, progress=False,
                  chunker_params=CHUNKER_PARAMS,
-                 start=datetime.now(), end=datetime.now()):
+                 start=datetime.utcnow(), end=datetime.utcnow()):
         self.cwd = os.getcwd()
         self.key = key
         self.repository = repository
diff --git a/borg/archiver.py b/borg/archiver.py
index 115b2bc38..664bd0df1 100644
--- a/borg/archiver.py
+++ b/borg/archiver.py
@@ -191,7 +191,7 @@ class Archiver:
                 if args.progress:
                     archive.stats.show_progress(final=True)
                 if args.stats:
-                    archive.end = datetime.now()
+                    archive.end = datetime.utcnow()
                     log_multi(DASHES,
                               str(archive),
                               DASHES,
@@ -202,7 +202,7 @@ class Archiver:
         self.output_filter = args.output_filter
         self.output_list = args.output_list
         dry_run = args.dry_run
-        t0 = datetime.now()
+        t0 = datetime.utcnow()
         if not dry_run:
             repository = self.open_repository(args, exclusive=True)
             manifest, key = Manifest.load(repository)