Merge branch 'L2SS-1914-fix_s3_packet_loader' into 'main'

L2SS-1914: Fix S3 packet loader

Closes L2SS-1914

See merge request !26

lofar_stingray/reader/_s3_packet_loader.py

-#  Copyright (C) 2024 ASTRON (Netherlands Institute for Radio Astronomy)
+#  Copyright (C) 2025 ASTRON (Netherlands Institute for Radio Astronomy)
 #  SPDX-License-Identifier: Apache-2.0
 
 """
@@ -8,12 +8,12 @@ of n minutes and storing them on a S3 backend
 
 import json
 import logging
-from datetime import datetime, timedelta
 import time
+from datetime import datetime, timedelta, timezone
 from typing import Generator
 
-from minio import Minio
 import minio.datatypes
+from minio import Minio
 
 logger = logging.getLogger()
 
@@ -120,6 +120,10 @@ class S3PacketLoader:  # pylint: disable=too-few-public-methods
                         continue
                     packet = json.loads(line)
                     packet_ts = datetime.fromisoformat(packet[ts_field])
+                    packet_ts = packet_ts.replace(
+                        tzinfo=packet_ts.tzinfo or timezone.utc
+                    ).astimezone(timezone.utc)
+
                     if packet_ts < start:
                         continue
                     if packet_ts > end: