diff --git a/main.py b/main.py
index de17377..7713e09 100644
--- a/main.py
+++ b/main.py
@@ -27,6 +27,9 @@ Promote = pd.read_excel("原数据.xlsx", sheet_name="职务变动") #
 for col in ["出生年月","任职年月","原职时间","参加工作时间","入职时间", "晋档起始", "晋级起始", "日期2"]:
     BaseData[col] = BaseData[col].apply(custom_date_parser)
 
+for col in ["晋档起始", "晋级起始"]:
+    BaseData[col] = BaseData[col].apply(lambda x: datetime(x.year, 1, 1) if isinstance(x, datetime) else x)
+
 for col in ["任职时间","工资执行时间"]:
     Promote[col] = Promote[col].apply(custom_date_parser)