diff --git a/LICENSE b/LICENSE
index 387b0b0..901fe39 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,7 +1,7 @@
 MIT License
 
-Copyright (c) 2011-2022, David Cooper <david@dtcooper.com>
-Copyright (c) 2017-2022, Carey Metcalfe <carey@cmetcalfe.ca>
+Copyright (c) 2011-2025, David Cooper <david@dtcooper.com>
+Copyright (c) 2017-2025, Carey Metcalfe <carey@cmetcalfe.ca>
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/docs/api.rst b/docs/api.rst
index 8d64e0f..e5db642 100644
--- a/docs/api.rst
+++ b/docs/api.rst
@@ -76,7 +76,7 @@ The ``FitFile`` Object
                 try:
                     fitfile = FitFile('/path.to/fitfile.fit')
                     fitfile.parse()
-                except FitParseError, e:
+                except FitParseError as e:
                     print "Error while parsing .FIT file: %s" % e
                     sys.exit(1)
 
diff --git a/fitparse/processors.py b/fitparse/processors.py
index 6848584..34b36ba 100644
--- a/fitparse/processors.py
+++ b/fitparse/processors.py
@@ -70,7 +70,7 @@ def process_type_bool(self, field_data):
     def process_type_date_time(self, field_data):
         value = field_data.value
         if value is not None and value >= 0x10000000:
-            field_data.value = datetime.datetime.utcfromtimestamp(UTC_REFERENCE + value)
+            field_data.value = datetime.datetime.fromtimestamp(timestamp=(UTC_REFERENCE + value), tz=datetime.timezone.utc).replace(tzinfo=None)
             field_data.units = None  # Units were 's', set to None
 
     def process_type_local_date_time(self, field_data):
@@ -78,7 +78,7 @@ def process_type_local_date_time(self, field_data):
             # NOTE: This value was created on the device using it's local timezone.
             #       Unless we know that timezone, this value won't be correct. However, if we
             #       assume UTC, at least it'll be consistent.
-            field_data.value = datetime.datetime.utcfromtimestamp(UTC_REFERENCE + field_data.value)
+            field_data.value = datetime.datetime.fromtimestamp(timestamp=(UTC_REFERENCE + field_data.value), tz=datetime.timezone.utc).replace(tzinfo=None)
             field_data.units = None
 
     def process_type_localtime_into_day(self, field_data):
diff --git a/tests/test.py b/tests/test.py
index 886f21f..e4851d5 100755
--- a/tests/test.py
+++ b/tests/test.py
@@ -66,7 +66,7 @@ def generate_fitfile(data=None, endian='<'):
 
 
 def secs_to_dt(secs):
-    return datetime.datetime.utcfromtimestamp(secs + UTC_REFERENCE)
+    return datetime.datetime.fromtimestamp(timestamp=(secs + UTC_REFERENCE), tz=datetime.timezone.utc).replace(tzinfo=None)
 
 
 def testfile(filename):
@@ -74,6 +74,7 @@ def testfile(filename):
 
 
 class FitFileTestCase(unittest.TestCase):
+
     def test_basic_file_with_one_record(self, endian='<'):
         f = FitFile(generate_fitfile(endian=endian))
         f.parse()
@@ -414,7 +415,11 @@ def test_mismatched_field_size(self):
         with warnings.catch_warnings(record=True) as w:
             f.parse()
             assert w
-            assert all("falling back to byte encoding" in str(x) for x in w)
+            assert all(
+                "falling back to byte encoding" in str(x)
+                for x in w
+                if x.category == UserWarning
+            )
         self.assertEqual(len(f.messages), 11293)
 
     def test_unterminated_file(self):