diff --git a/borax/calendars/lunardate.py b/borax/calendars/lunardate.py
index 1ff9b59..b7adda7 100644
--- a/borax/calendars/lunardate.py
+++ b/borax/calendars/lunardate.py
@@ -456,7 +456,10 @@ class LunarDate(EncoderMixin):
     @property
     def cn_day_calendar(self) -> str:
         if self.day == 1:
-            return self.cn_month
+            if self.leap:
+                return '闰{}'.format(self.cn_month)
+            else:
+                return '{}月'.format(self.cn_month)
         else:
             return self.cn_day
 

diff --git a/tests/test_lunardate.py b/tests/test_lunardate.py
index 3d1d7a1..86417c7 100644
--- a/tests/test_lunardate.py
+++ b/tests/test_lunardate.py
@@ -127,6 +127,7 @@ class FormatterTestCase(unittest.TestCase):
         ld2 = LunarDate(2018, 11, 23)
         self.assertEqual('二〇一八/冬/廿三', ld2.strftime('%Y/%M/%D'))
         self.assertEqual('二〇一八/十一/廿三', ld2.strftime('%Y/%N/%D'))
+        self.assertEqual('廿三', ld2.strftime('%F'))
 
         ld3 = LunarDate(2017, 6, 3, 1)
         self.assertEqual('61', ld3.strftime('%m%l'))
@@ -143,6 +144,12 @@ class FormatterTestCase(unittest.TestCase):
         ld = LunarDate(2020, 3, 23)
         self.assertEqual('tem:-', ld.strftime('tem:%t'))
 
+    def test_cn_calendar_day(self):
+        ld = LunarDate(2017, 6, 1, 1)
+        self.assertEqual('闰六', ld.strftime('%F'))
+        ld1 = LunarDate(2017, 11, 1, 0)
+        self.assertEqual('冬月', ld1.strftime('%F'))
+
 
 class LCalendarTestCase(unittest.TestCase):
     def test_ndays(self):

农历:LunarDate.cn_day_calendar 计算错误%F 描述符缺少“月”后缀
## 问题类型

- [X] BUG
- [ ] 新功能
- [ ] 功能优化

## 问题

LunarDate.cn_day_calendar 计算错误，同时 '%F' 描述符计算错误。


## 代码

```python
from borax.calendars import LunarDate, LCalendars
print([LunarDate(year=2017, month=month, day=1, leap=leap).cn_day_calendar for month, days, leap in LCalendars.iter_year_month(2017)])
```

结果为

```
['正', '二', '三', '四', '五', '六', '六', '七', '八', '九', '十', '冬', '腊']
```

正确结果为

```

```
['正月', '二月', '三月', '四月', '五月', '六月', '闰六', '七月', '八月', '九月', '十月', '冬月', '腊月']
```
```

tests/test_lunardate.py::FormatterTestCase::test_cn_calendar_day
tests/test_lunardate.py::LunarDateTestCase::test_comparison tests/test_lunardate.py::LunarDateTestCase::test_convert_datetime tests/test_lunardate.py::LunarDateTestCase::test_create_date tests/test_lunardate.py::LunarDateTestCase::test_create_specific_dates tests/test_lunardate.py::LunarDateTestCase::test_immutable_feature tests/test_lunardate.py::LunarDateTestCase::test_new_date tests/test_lunardate.py::LunarDateTestCase::test_solar_and_lunar tests/test_lunardate.py::LunarDateTestCase::test_term_ganzhi_feature tests/test_lunardate.py::LunarDateTestCase::test_timedelta tests/test_lunardate.py::PrivateMethodsTestCase::test_year_info tests/test_lunardate.py::FormatterTestCase::test_term tests/test_lunardate.py::FormatterTestCase::test_valid_format tests/test_lunardate.py::LCalendarTestCase::test_delta tests/test_lunardate.py::LCalendarTestCase::test_leap_check tests/test_lunardate.py::LCalendarTestCase::test_ndays