diff --git a/src/yunohost/app.py b/src/yunohost/app.py
index e107d7ac9..0664a24b2 100644
--- a/src/yunohost/app.py
+++ b/src/yunohost/app.py
@@ -1762,8 +1762,7 @@ def _get_app_status(app_id, format_date=False):
             if not v:
                 status[f] = '-'
             else:
-                status[f] = time.strftime(m18n.n('format_datetime_short'),
-                                          time.gmtime(v))
+                status[f] = datetime.utcfromtimestamp(v).replace(tzinfo=pytz.utc)
     return status
 
 
diff --git a/src/yunohost/backup.py b/src/yunohost/backup.py
index 6ef9a0554..492687eaf 100644
--- a/src/yunohost/backup.py
+++ b/src/yunohost/backup.py
@@ -33,6 +33,8 @@ import shutil
 import subprocess
 import csv
 import tempfile
+import pytz
+from datetime import datetime
 from glob import glob
 from collections import OrderedDict
 
@@ -2266,8 +2268,8 @@ def backup_info(name, with_details=False, human_readable=False):
 
     result = {
         'path': archive_file,
-        'created_at': time.strftime(m18n.n('format_datetime_short'),
-                                    time.gmtime(info['created_at'])),
+        'created_at': datetime.utcfromtimestamp(info['created_at'])
+                        .replace(tzinfo=pytz.utc),
         'description': info['description'],
         'size': size,
     }
diff --git a/src/yunohost/settings.py b/src/yunohost/settings.py
index d2526316e..3227ad3e3 100644
--- a/src/yunohost/settings.py
+++ b/src/yunohost/settings.py
@@ -154,7 +154,7 @@ def settings_reset_all():
     # addition but we'll see if this is a common need.
     # Another solution would be to use etckeeper and integrate those
     # modification inside of it and take advantage of its git history
-    old_settings_backup_path = SETTINGS_PATH_OTHER_LOCATION % datetime.now().strftime("%F_%X")
+    old_settings_backup_path = SETTINGS_PATH_OTHER_LOCATION % datetime.utcnow().strftime("%F_%X")
     _save_settings(settings, location=old_settings_backup_path)
 
     for value in settings.values():