diff --git a/packages/vant/src/calendar/Calendar.tsx b/packages/vant/src/calendar/Calendar.tsx
index 24b76472f..a3d40e1e6 100644
--- a/packages/vant/src/calendar/Calendar.tsx
+++ b/packages/vant/src/calendar/Calendar.tsx
@@ -175,7 +175,10 @@ export default defineComponent({
 
     const bodyRef = ref<HTMLElement>();
 
-    const subtitle = ref('');
+    const subtitle = ref<{ text: string; date?: Date }>({
+      text: '',
+      date: undefined,
+    });
     const currentDate = ref(getInitialDate());
 
     const [monthRefs, setMonthRefs] = useRefs<CalendarMonthInstance>();
@@ -267,7 +270,10 @@ export default defineComponent({
 
       /* istanbul ignore else */
       if (currentMonth) {
-        subtitle.value = currentMonth.getTitle();
+        subtitle.value = {
+          text: currentMonth.getTitle(),
+          date: currentMonth.date,
+        };
       }
     };
 
@@ -525,8 +531,9 @@ export default defineComponent({
       <div class={bem()}>
         <CalendarHeader
           v-slots={pick(slots, ['title', 'subtitle'])}
+          date={subtitle.value.date}
           title={props.title}
-          subtitle={subtitle.value}
+          subtitle={subtitle.value.text}
           showTitle={props.showTitle}
           showSubtitle={props.showSubtitle}
           firstDayOfWeek={dayOffset.value}
diff --git a/packages/vant/src/calendar/CalendarHeader.tsx b/packages/vant/src/calendar/CalendarHeader.tsx
index c38e4eeb8..c7b3f8916 100644
--- a/packages/vant/src/calendar/CalendarHeader.tsx
+++ b/packages/vant/src/calendar/CalendarHeader.tsx
@@ -8,6 +8,7 @@ export default defineComponent({
   name,
 
   props: {
+    date: Date,
     title: String,
     subtitle: String,
     showTitle: Boolean,
@@ -30,7 +31,12 @@ export default defineComponent({
 
     const renderSubtitle = () => {
       if (props.showSubtitle) {
-        const title = slots.subtitle ? slots.subtitle() : props.subtitle;
+        const title = slots.subtitle
+          ? slots.subtitle({
+              date: props.date,
+              text: props.subtitle,
+            })
+          : props.subtitle;
         return (
           <div class={bem('header-subtitle')} onClick={onClickSubtitle}>
             {title}
diff --git a/packages/vant/src/calendar/README.md b/packages/vant/src/calendar/README.md
index c5bfebe3d..541df1aec 100644
--- a/packages/vant/src/calendar/README.md
+++ b/packages/vant/src/calendar/README.md
@@ -331,14 +331,14 @@ Following props are supported when the type is multiple
 
 ### Slots
 
-| Name                  | Description               | SlotProps               |
-| --------------------- | ------------------------- | ----------------------- |
-| title                 | Custom title              | -                       |
-| subtitle `v3.1.3`     | Custom subtitle           | -                       |
-| footer                | Custom footer             | -                       |
-| confirm-text `v3.2.6` | Custom confirm text       | _{ disabled: boolean }_ |
-| top-info `v3.0.17`    | Custom top info of day    | _day: Day_              |
-| bottom-info `v3.0.17` | Custom bottom info of day | _day: Day_              |
+| Name | Description | SlotProps |
+| --- | --- | --- |
+| title | Custom title | - |
+| subtitle `v3.1.3` | Custom subtitle | _{ text: string, date?: Date }_ |
+| footer | Custom footer | - |
+| confirm-text `v3.2.6` | Custom confirm text | _{ disabled: boolean }_ |
+| top-info `v3.0.17` | Custom top info of day | _day: Day_ |
+| bottom-info `v3.0.17` | Custom bottom info of day | _day: Day_ |
 
 ### Methods
 
diff --git a/packages/vant/src/calendar/README.zh-CN.md b/packages/vant/src/calendar/README.zh-CN.md
index 8025cb2ed..862431e85 100644
--- a/packages/vant/src/calendar/README.zh-CN.md
+++ b/packages/vant/src/calendar/README.zh-CN.md
@@ -337,14 +337,14 @@ export default {
 
 ### Slots
 
-| 名称                  | 说明                     | 参数                    |
-| --------------------- | ------------------------ | ----------------------- |
-| title                 | 自定义标题               | -                       |
-| subtitle `v3.1.3`     | 自定义日历副标题         | -                       |
-| footer                | 自定义底部区域内容       | -                       |
-| confirm-text `v3.2.6` | 自定义确认按钮的内容     | _{ disabled: boolean }_ |
-| top-info `v3.0.17`    | 自定义日期上方的提示信息 | _day: Day_              |
-| bottom-info `v3.0.17` | 自定义日期下方的提示信息 | _day: Day_              |
+| 名称 | 说明 | 参数 |
+| --- | --- | --- |
+| title | 自定义标题 | - |
+| subtitle `v3.1.3` | 自定义日历副标题 | _{ text: string, date?: Date }_ |
+| footer | 自定义底部区域内容 | - |
+| confirm-text `v3.2.6` | 自定义确认按钮的内容 | _{ disabled: boolean }_ |
+| top-info `v3.0.17` | 自定义日期上方的提示信息 | _day: Day_ |
+| bottom-info `v3.0.17` | 自定义日期下方的提示信息 | _day: Day_ |
 
 ### 方法
 
diff --git a/packages/vant/src/calendar/test/__snapshots__/index.spec.ts.snap b/packages/vant/src/calendar/test/__snapshots__/index.spec.ts.snap
index 0d69349fa..4943bdb0b 100644
--- a/packages/vant/src/calendar/test/__snapshots__/index.spec.ts.snap
+++ b/packages/vant/src/calendar/test/__snapshots__/index.spec.ts.snap
@@ -934,6 +934,12 @@ exports[`should render confirm-text slot correctly 1`] = `
 </button>
 `;
 
+exports[`should render subtitle slot with params 1`] = `
+<div class="van-calendar__header-subtitle">
+  Custom Subtitle
+</div>
+`;
+
 exports[`should render title、footer、subtitle slot correctly 1`] = `
 <div class="van-calendar">
   <div class="van-calendar__header">
diff --git a/packages/vant/src/calendar/test/index.spec.ts b/packages/vant/src/calendar/test/index.spec.ts
index 7e536e2c6..2975ebb8c 100644
--- a/packages/vant/src/calendar/test/index.spec.ts
+++ b/packages/vant/src/calendar/test/index.spec.ts
@@ -365,6 +365,27 @@ test('should render title、footer、subtitle slot correctly', async () => {
   expect(wrapper.html()).toMatchSnapshot();
 });
 
+test('should render subtitle slot with params', async () => {
+  const wrapper = mount(Calendar, {
+    props: {
+      minDate,
+      maxDate,
+      poppable: false,
+      defaultDate: minDate,
+      lazyRender: false,
+    },
+    slots: {
+      subtitle: ({ text }) => `Custom Subtitle ${text}`,
+    },
+  });
+
+  await later();
+
+  expect(
+    wrapper.find('.van-calendar__header-subtitle').html()
+  ).toMatchSnapshot();
+});
+
 test('should reset when type changed', async () => {
   const wrapper = mount(Calendar, {
     props: {