diff --git a/test/test_utils.py b/test/test_utils.py
index e82f551bcb..a2b4593527 100644
--- a/test/test_utils.py
+++ b/test/test_utils.py
@@ -444,6 +444,8 @@ def test_unified_timestamps(self):
         self.assertEqual(unified_timestamp('Sep 11, 2013 | 5:49 AM'), 1378878540)
         self.assertEqual(unified_timestamp('December 15, 2017 at 7:49 am'), 1513324140)
         self.assertEqual(unified_timestamp('2018-03-14T08:32:43.1493874+00:00'), 1521016363)
+        self.assertEqual(unified_timestamp('Sunday, 26 Nov 2006, 19:00'), 1164567600)
+        self.assertEqual(unified_timestamp('wed, aug 16, 2008, 12:00pm'), 1218931200)
 
         self.assertEqual(unified_timestamp('December 31 1969 20:00:01 EDT'), 1)
         self.assertEqual(unified_timestamp('Wednesday 31 December 1969 18:01:26 MDT'), 86)
diff --git a/yt_dlp/utils/_utils.py b/yt_dlp/utils/_utils.py
index 3e3b285a47..0d3e707c58 100644
--- a/yt_dlp/utils/_utils.py
+++ b/yt_dlp/utils/_utils.py
@@ -1217,7 +1217,7 @@ def unified_timestamp(date_str, day_first=True):
         return None
 
     date_str = re.sub(r'\s+', ' ', re.sub(
-        r'(?i)[,|]|(mon|tues?|wed(nes)?|thu(rs)?|fri|sat(ur)?)(day)?', '', date_str))
+        r'(?i)[,|]|(mon|tues?|wed(nes)?|thu(rs)?|fri|sat(ur)?|sun)(day)?', '', date_str))
 
     pm_delta = 12 if re.search(r'(?i)PM', date_str) else 0
     timezone, date_str = extract_timezone(date_str)