diff --git a/babel/dates.py b/babel/dates.py
index 2f1b116e4..c317de358 100644
--- a/babel/dates.py
+++ b/babel/dates.py
@@ -1656,10 +1656,10 @@ def get_week_number(self, day_of_period: int, day_of_week: int | None = None) ->
             # If the weeknumber exceeds the maximum number of weeks for the given year
             # we must count from zero.For example the above calculation gives week 53
             # for 2018-12-31. By iso-calender definition 2018 has a max of 52
-            # weeks, thus the weeknumber must be 53-52=1.
+            # weeks, thus the weeknumber must be 53-1=52.
             max_weeks = datetime.date(year=self.value.year, day=28, month=12).isocalendar()[1]
             if week_number > max_weeks:
-                week_number -= max_weeks
+                week_number -= 1
 
         return week_number
 
diff --git a/tests/test_dates.py b/tests/test_dates.py
index fef68ae73..22077bc48 100644
--- a/tests/test_dates.py
+++ b/tests/test_dates.py
@@ -795,3 +795,11 @@ def test_issue_892():
 def test_issue_1089():
     assert dates.format_datetime(datetime.now(), locale="ja_JP@mod")
     assert dates.format_datetime(datetime.now(), locale=Locale.parse("ja_JP@mod"))
+
+
+def test_issue_1133():
+    format = dates.DateTimeFormat(date(2006, 1, 8), Locale.parse('de_DE'))
+    assert format.get_week_number(6) == 1
+
+    format = dates.DateTimeFormat(date(2006, 1, 8), Locale.parse('en_US'))
+    assert format.get_week_number(6) == 2