diff --git a/src/convertdate/indian_civil.py b/src/convertdate/indian_civil.py
index 8f3c208..d15d9ec 100644
--- a/src/convertdate/indian_civil.py
+++ b/src/convertdate/indian_civil.py
@@ -128,7 +128,7 @@ def to_gregorian(year, month, day):
 
 
 def month_length(year, month):
-    if month in HAVE_31_DAYS or (month == 1 and isleap(year - SAKA_EPOCH)):
+    if month in HAVE_31_DAYS or (month == 1 and isleap(year + SAKA_EPOCH)):
         return 31
     return 30
 
diff --git a/tests/test_indian_civil.py b/tests/test_indian_civil.py
index b6d68a1..6c57c16 100644
--- a/tests/test_indian_civil.py
+++ b/tests/test_indian_civil.py
@@ -41,6 +41,14 @@ def test_month_length_indian_civil(self):
         self.assertEqual(indian_civil.month_length(1922, 1), 31)
         self.assertEqual(indian_civil.month_length(1923, 1), 30)
 
+    def test_chaitra_century_leap_years(self):
+        for year, expected in [(1822, 30), (1878, 31), (1922, 31), (1978, 31), (2022, 30)]:
+            with self.subTest(year=year):
+                self.assertEqual(indian_civil.month_length(year, 1), expected)
+                days = [day for week in indian_civil.monthcalendar(year, 1) for day in week if day is not None]
+                self.assertEqual(days, list(range(1, expected + 1)))
+                self.assertEqual(indian_civil.to_jd(year, 2, 1) - indian_civil.to_jd(year, 1, 1), expected)
+
     def test_monthcalendar_indian_civil(self):
         self.assertEqual(indian_civil.monthcalendar(1936, 8).pop(0).pop(4), 1)
         self.assertEqual(indian_civil.monthcalendar(1927, 2).pop(0).pop(4), 1)