diff --git a/CHANGES b/CHANGES
index 54c8766fbb4..53e11f67b8d 100644
--- a/CHANGES
+++ b/CHANGES
@@ -51,6 +51,7 @@ Bugs fixed
 * #8341: C, fix intersphinx lookup types for names in declarations.
 * C, C++: in general fix intersphinx and role lookup types.
 * #8683: :confval:`html_last_updated_fmt` does not support UTC offset (%z)
+* #8683: :confval:`html_last_updated_fmt` generates wrong time zone for %Z
 
 Testing
 --------
diff --git a/sphinx/util/i18n.py b/sphinx/util/i18n.py
index 05d476dddfe..6ea004bb064 100644
--- a/sphinx/util/i18n.py
+++ b/sphinx/util/i18n.py
@@ -236,7 +236,7 @@ def find_catalog_source_files(locale_dirs: List[str], locale: str, domains: List
     '%X':  'medium',  # Locale’s appropriate time representation.
     '%y':  'YY',      # Year without century as a zero-padded decimal number.
     '%Y':  'yyyy',    # Year with century as a decimal number.
-    '%Z':  'zzzz',    # Time zone name (no characters if no time zone exists).
+    '%Z':  'zzz',     # Time zone name (no characters if no time zone exists).
     '%z':  'ZZZ',     # UTC offset in the form ±HHMM[SS[.ffffff]]
                       # (empty string if the object is naive).
     '%%':  '%',
diff --git a/tests/test_util_i18n.py b/tests/test_util_i18n.py
index d6f63117599..180350e867b 100644
--- a/tests/test_util_i18n.py
+++ b/tests/test_util_i18n.py
@@ -88,6 +88,8 @@ def test_format_date():
     assert i18n.format_date(format, date=date) == 'Feb 7, 2016'
 
     # timezone
+    format = '%Z'
+    assert i18n.format_date(format, date=datet) == 'UTC'
     format = '%z'
     assert i18n.format_date(format, date=datet) == '+0000'