diff --git a/processors/jiandaoyun.py b/processors/jiandaoyun.py
index 6ac20b8..7c31fcf 100644
--- a/processors/jiandaoyun.py
+++ b/processors/jiandaoyun.py
@@ -22,6 +22,9 @@ class JiandaoyunUploader:
     # 需要转换为数字的字段
     NUMERIC_FIELDS = {"最高限价", "最高投标限价", "预估金额", "招标估算金额"}
 
+    # 需要转换为日期的字段
+    DATE_FIELDS = {"发布时间", "项目发布时间", "投标截止日", "招标时间"}
+
     def __init__(self, api_key: str = None):
         self.api_key = api_key or JDY_CONFIG["api_key"]
         self.headers = {
@@ -116,10 +119,30 @@ class JiandaoyunUploader:
                 num = self._parse_price(value)
                 if num is not None:
                     jdy_data[jdy_field] = {"value": num}
+            elif local_field in self.DATE_FIELDS:
+                iso_date = self._to_iso8601(value)
+                if iso_date:
+                    jdy_data[jdy_field] = {"value": iso_date}
             else:
                 jdy_data[jdy_field] = {"value": value}
         return jdy_data
 
+    @staticmethod
+    def _to_iso8601(date_str: str) -> str:
+        """将日期字符串转为 ISO 8601 格式（北京时间 UTC+8）"""
+        if not date_str or date_str in ("文档未提及", "详见公告"):
+            return ""
+        s = str(date_str).strip()
+        from datetime import datetime as _dt
+        for fmt in ("%Y-%m-%d %H:%M:%S", "%Y-%m-%d %H:%M", "%Y-%m-%d"):
+            try:
+                dt = _dt.strptime(s, fmt)
+                return dt.strftime("%Y-%m-%dT%H:%M:%S") + "+08:00"
+            except ValueError:
+                continue
+        # 无法解析，原样返回
+        return s
+
     @staticmethod
     def _parse_price(price_str) -> int | None:
         """将价格字符串转为纯数字（元）"""