diff --git a/packages/vant/src/calendar/Calendar.tsx b/packages/vant/src/calendar/Calendar.tsx
index 2da16a6a4..1ed7d4a32 100644
--- a/packages/vant/src/calendar/Calendar.tsx
+++ b/packages/vant/src/calendar/Calendar.tsx
@@ -165,6 +165,11 @@ export default defineComponent({
           defaultDate = [];
         }
 
+        // reset invalid default date
+        if (defaultDate.length === 1 && compareDay(defaultDate[0], now) === 1) {
+          defaultDate = [];
+        }
+
         const min = minDate.value;
         const max = maxDate.value;
 
diff --git a/packages/vant/src/calendar/test/index.spec.ts b/packages/vant/src/calendar/test/index.spec.ts
index f566beed5..e31b16516 100644
--- a/packages/vant/src/calendar/test/index.spec.ts
+++ b/packages/vant/src/calendar/test/index.spec.ts
@@ -655,3 +655,19 @@ test('should render confirm-text slot correctly', async () => {
 
   expect(wrapper.find('.van-calendar__confirm').html()).toMatchSnapshot();
 });
+
+test('the defaultDate length of 1 should be handled correctly', async () => {
+  const wrapper = mount(Calendar, {
+    props: {
+      poppable: false,
+      defaultDate: [getNextDay(now)],
+      type: 'range',
+    },
+  });
+
+  wrapper.find('.van-calendar__confirm').trigger('click');
+  expect(wrapper.emitted<[Date]>('confirm')![0][0]).toEqual([
+    now,
+    getNextDay(now),
+  ]);
+});