diff --git a/crans_utils.py b/crans_utils.py
index 36a7975..6317907 100644
--- a/crans_utils.py
+++ b/crans_utils.py
@@ -355,6 +355,7 @@ def datetime_from_generalized_time_format(gtf):
         tz_dict = build_tz_dict()
         the_timezone = tz_dict.get(tz, pytz.utc)
         the_date = the_timezone.localize(the_date)
+        the_date = the_timezone.normalize(the_date)
     return the_date
 
 def datetime_to_generalized_time_format(datetime_obj):
@@ -363,6 +364,7 @@ def datetime_to_generalized_time_format(datetime_obj):
     if datetime_obj.utcoffset() is None:
         if pytz is not None:
             datetime_obj = pytz.utc.localize(datetime_obj)
+            datetime_obj = pytz.utc.normalize(datetime_obj)
         else:
             to_append = "Z"
     mostly_gtf = datetime.datetime.strftime(datetime_obj, "%Y%m%d%H%M%S%z")