diff --git a/functions.py b/functions.py
index 5eb6154..2195a94 100644
--- a/functions.py
+++ b/functions.py
@@ -41,7 +41,7 @@ class Radiation:
     def _time_conversion(self, timestamp, local_timezone):
         csv_naive_time = datetime.fromisoformat(timestamp)
         # Set timezone
-        csv_aware_time = csv_naive_time.astimezone(local_timezone)
+        csv_aware_time = csv_naive_time.localize(local_timezone)
         return csv_aware_time
 
     def _radiation_conversion(self, radiation, si_factor):
@@ -102,7 +102,7 @@ class Photo:
         # date.value creates datetime object in pic_naive_time
         pic_naive_time = date.value
         # Set timezone
-        pic_aware_time = pic_naive_time.astimezone(local_timezone)
+        pic_aware_time = pic_naive_time.localize(local_timezone)
         return pic_aware_time
 
 class Match:
diff --git a/rad_tag.py b/rad_tag.py
index 8013452..148278c 100755
--- a/rad_tag.py
+++ b/rad_tag.py
@@ -112,7 +112,7 @@ if args.gpx:
     for track in gpx_reader.tracks:
         for segment in track.segments:
             for point in segment.points:
-                point_aware_time = point.time.astimezone(local_timezone)
+                point_aware_time = point.time.localize(local_timezone)
                 position = (
                     point_aware_time,
                     point.latitude,