diff --git a/src/routes/events.ts b/src/routes/events.ts
index 825c6b4..f72c05b 100644
--- a/src/routes/events.ts
+++ b/src/routes/events.ts
@@ -6,12 +6,12 @@ import { asyncHandler } from '../middleware/errorHandler';
 
 const router = Router();
 
-// Validation schemas
+// Validation schemas - date can be empty string for reminders
 const createEventSchema = z.object({
   type: z.enum(['anniversary', 'reminder']),
   title: z.string().min(1, 'Title is required').max(200),
   content: z.string().optional(),
-  date: z.string().datetime(), // ISO datetime string
+  date: z.string().optional(), // Can be empty for reminders
   is_lunar: z.boolean().default(false),
   repeat_type: z.enum(['yearly', 'monthly', 'none']).default('none'),
   is_holiday: z.boolean().default(false),
@@ -104,7 +104,9 @@ router.post(
     const data = createEventSchema.parse(req.body);
 
     const eventId = crypto.randomUUID();
-    const dateValue = new Date(data.date).toISOString();
+    // Handle empty date - store as null for reminders without specific time
+    // 直接存储前端发送的原始日期字符串，不做 toISOString 转换（避免时区问题）
+    const dateValue = data.date || null;
 
     await db.execute({
       sql: `INSERT INTO events (id, user_id, type, title, content, date, is_lunar, repeat_type, is_holiday, is_completed, created_at, updated_at)
@@ -154,9 +156,10 @@ router.put(
       updates.push('content = ?');
       args.push(data.content);
     }
-    if (data.date) {
+    if (data.date !== undefined) {
       updates.push('date = ?');
-      args.push(new Date(data.date).toISOString());
+      // 直接存储原始字符串，不做时区转换
+      args.push(data.date || null);
     }
     if (data.is_lunar !== undefined) {
       updates.push('is_lunar = ?');