diff --git a/borax/__init__.py b/borax/__init__.py
index c3df011..86ad3c7 100644
--- a/borax/__init__.py
+++ b/borax/__init__.py
@@ -1,2 +1,2 @@
-__version__ = '4.1.0'
+__version__ = '4.1.1'
 __author__ = 'kinegratii'
diff --git a/docs/changelog.md b/docs/changelog.md
index 1be80c8..d6331ae 100644
--- a/docs/changelog.md
+++ b/docs/changelog.md
@@ -1,6 +1,6 @@
 # 更新日志
 
-## v4.1.1
+## v4.1.1 (20240630)
 
 - 新增创建农历年或农历月最后一天的方法 `LunarDate.last_day`
 - `SolarFestival` 和`LunarFestival` 初始化函数 `freq` 参数支持字符串设置（ [ #56](https://github.com/kinegratii/borax/issues/56) ）
diff --git a/docs/guides/lunardate.md b/docs/guides/lunardate.md
index baea60f..0d52024 100644
--- a/docs/guides/lunardate.md
+++ b/docs/guides/lunardate.md
@@ -103,6 +103,19 @@ LunarDate(2018, 6, 29, 0)
 LunarDate(2018, 7, 2, 0)
 ```
 
+获取农历年或农历月的最后一天。（v4.1.1新增。）
+
+```bash
+>>>LunarDate.last_day(2023)
+LunarDate(2023, 12, 30)
+>>>LunarDate.last_day(2023, 2)
+LunarDate(2023, 2, 30)
+>>>LunarDate.last_day(2023, 2, 1)
+LunarDate(2023, 2, 29, 1)
+```
+
+
+
 `lunardate` 模块可用的日期上下限
 
 ```shell
diff --git a/docs/images/app_festival_creator.png b/docs/images/app_festival_creator.png
index 03f7be7..ef4792b 100644
Binary files a/docs/images/app_festival_creator.png and b/docs/images/app_festival_creator.png differ
diff --git a/tests/test_lunardate.py b/tests/test_lunardate.py
index 6005949..3c453fb 100644
--- a/tests/test_lunardate.py
+++ b/tests/test_lunardate.py
@@ -37,8 +37,6 @@ def test_create_specific_dates(self):
         self.assertEqual(5, LCalendars.delta(today.after(5), today))
         self.assertEqual(-5, LCalendars.delta(today.before(5), today))
 
-        self.assertEqual(LunarDate(2023, 12, 30), LunarDate.last_day_of_year(2023))
-
     def test_last_day(self):
         self.assertEqual(LunarDate(2023, 12, 30), LunarDate.last_day(2023))
         self.assertEqual(LunarDate(2023, 1, 29), LunarDate.last_day(2023, 1))