use of timezone for backward compatibility

django_datadog_logger/formatters/datadog.py

@@ -4,6 +4,11 @@
 import typing
 from logging import LogRecord
 
+try:
+    import zoneinfo
+except ImportError:
+    from backports import zoneinfo
+
 import json_log_formatter
 from django.conf import settings
 from django.core.exceptions import DisallowedHost
@@ -77,7 +82,7 @@ def json_record(self, message: str, extra: typing.Dict, record: LogRecord) -> ty
             "logger.thread_name": record.threadName,
             "logger.method_name": record.funcName,
             "date": (
-                datetime.datetime.fromtimestamp(record.created, tz=datetime.UTC).isoformat()
+                datetime.datetime.fromtimestamp(record.created, tz=zoneinfo.ZoneInfo("UTC")).isoformat()
             ),
             "status": record.levelname,
         }