diff --git a/src/main/java/com/freedom/admin/controller/PublicTodoController.java b/src/main/java/com/freedom/admin/controller/PublicTodoController.java
index c561ac0..c80046f 100644
--- a/src/main/java/com/freedom/admin/controller/PublicTodoController.java
+++ b/src/main/java/com/freedom/admin/controller/PublicTodoController.java
@@ -93,6 +93,10 @@ public class PublicTodoController {
         }
         try {
             publicTodo.setId(null);
+            // DATE 列不接受空串，空值统一转 null
+            if (StringUtils.isBlank(publicTodo.getDueDate())) {
+                publicTodo.setDueDate(null);
+            }
             if (publicTodo.getStatus() == null) {
                 publicTodo.setStatus(0);
             }
@@ -123,6 +127,10 @@ public class PublicTodoController {
             return Result.error().message("标题不能为空");
         }
         try {
+            // DATE 列不接受空串，空值统一转 null
+            if (StringUtils.isBlank(publicTodo.getDueDate())) {
+                publicTodo.setDueDate(null);
+            }
             publicTodo.setUpdateBy(OPERATOR);
             publicTodo.setUpdateDate(new Date());
             publicTodo.setCreateBy(null);
@@ -210,11 +218,12 @@ public class PublicTodoController {
             int done = 0;
             int overdue = 0;
             Map<String, Integer> byCategory = new HashMap<>();
-            Date today = new Date();
+            // 逾期按 yyyy-MM-dd 字符串比较，与前端口径一致，不经时区换算
+            String today = new java.text.SimpleDateFormat("yyyy-MM-dd").format(new Date());
             for (PublicTodo item : list) {
                 if (item.getStatus() != null && item.getStatus() == 1) {
                     done++;
-                } else if (item.getDueDate() != null && item.getDueDate().before(today)) {
+                } else if (item.getDueDate() != null && item.getDueDate().compareTo(today) < 0) {
                     overdue++;
                 }
                 String cat = StringUtils.isBlank(item.getCategory()) ? "未分类" : item.getCategory();
diff --git a/src/main/java/com/freedom/admin/entity/PublicTodo.java b/src/main/java/com/freedom/admin/entity/PublicTodo.java
index e322279..e838084 100644
--- a/src/main/java/com/freedom/admin/entity/PublicTodo.java
+++ b/src/main/java/com/freedom/admin/entity/PublicTodo.java
@@ -5,7 +5,6 @@ import com.baomidou.mybatisplus.annotation.TableId;
 import com.baomidou.mybatisplus.annotation.TableName;
 import com.fasterxml.jackson.annotation.JsonFormat;
 import lombok.Data;
-import org.springframework.format.annotation.DateTimeFormat;
 
 import java.io.Serializable;
 import java.util.Date;
@@ -49,11 +48,10 @@ public class PublicTodo implements Serializable {
     private String category;
 
     /**
-     * 截止日期
+     * 截止日期（yyyy-MM-dd）
+     * 用 String 映射 DATE 列：字符串往返不经 JDBC 时区换算，避免差一天
      */
-    @DateTimeFormat(pattern = "yyyy-MM-dd")
-    @JsonFormat(pattern = "yyyy-MM-dd", timezone = "GMT+8")
-    private Date dueDate;
+    private String dueDate;
 
     /**
      * 状态：0未完成 1已完成