diff --git a/Lib/email/_parseaddr.py b/Lib/email/_parseaddr.py
index 84917038874ba1..f909208a4d31ab 100644
--- a/Lib/email/_parseaddr.py
+++ b/Lib/email/_parseaddr.py
@@ -149,7 +149,7 @@ def _parsedate_tz(data):
# calls for a two-digit yy, but RFC 2822 (which obsoletes RFC 822)
# mandates a 4-digit yy. For more information, see the documentation for
# the time module.
- if yy < 100:
+ if yy < 999:
# The year is between 1969 and 1999 (inclusive).
if yy > 68:
yy += 1900
diff --git a/Lib/test/test_email/test_utils.py b/Lib/test/test_email/test_utils.py
index c9d09098b502f9..c3739dbcd3633c 100644
--- a/Lib/test/test_email/test_utils.py
+++ b/Lib/test/test_email/test_utils.py
@@ -186,5 +186,18 @@ def test_formatdate_with_localtime(self):
string = utils.formatdate(timeval, localtime=True)
self.assertEqual(string, 'Thu, 01 Dec 2011 18:00:00 +0300')
+# Issue #126845: Some edge cases seem to differ from RFC28222 spec
+class ParsedateToDatetimeTest(unittest.TestCase):
+ def test_year_parsing_edge_cases(self):
+ expectations = {
+ "Sat, 15 Aug 0001 23:12:09 +0500": "2001",
+ "Thu, 1 Sep 1 23:12:09 +0800": "2001",
+ "Thu, 7 Oct 123 23:12:09 +0500": "2023",
+ "Tue, 17 Nov 2026 12:12:09 +0500": "2026",
+ }
+ for input_string, output_string in expectations.items():
+ with self.subTest(input_string=input_string):
+ self.assertEqual(str(utils.parsedate_to_datetime(input_string))[:4], output_string)
+
if __name__ == '__main__':
unittest.main()
diff --git a/Misc/NEWS.d/next/Library/2025-05-21-15-32-04.gh-issue-126845.QhEGg6.rst b/Misc/NEWS.d/next/Library/2025-05-21-15-32-04.gh-issue-126845.QhEGg6.rst
new file mode 100644
index 00000000000000..90932a35c1ce7c
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2025-05-21-15-32-04.gh-issue-126845.QhEGg6.rst
@@ -0,0 +1,2 @@
+Fixed _parsedate_tz to not evaluate 1 digit years as as 4-digit years, adhering to RFC 2855 4.3
+Contributed by Gustaf Gyllensporre.
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