Fixed #22603 -- Reorganized classes in django.db.backends.

django/db/backends/sqlite3/utils.py

@@ -0,0 +1,11 @@
+from django.conf import settings
+from django.utils import timezone
+from django.utils.dateparse import parse_datetime
+
+
+def parse_datetime_with_timezone_support(value):
+    dt = parse_datetime(value)
+    # Confirm that dt is naive before overwriting its tzinfo.
+    if dt is not None and settings.USE_TZ and timezone.is_naive(dt):
+        dt = dt.replace(tzinfo=timezone.utc)
+    return dt