diff --git a/docs/examples/debug.tsx b/docs/examples/debug.tsx
index 038c3853f..98fa51e1a 100644
--- a/docs/examples/debug.tsx
+++ b/docs/examples/debug.tsx
@@ -149,8 +149,9 @@ export default () => {
       <SinglePicker
         // Shared
         {...sharedLocale}
-        picker="week"
-        multiple
+        // picker="week"
+        // multiple
+        showTime
         defaultValue={[
           dayjs(),
           // dayjs('2000-01-01'),
@@ -186,12 +187,12 @@ export default () => {
         }}
       />
       <br />
-      {/* <RangePicker
+      <RangePicker
         {...sharedLocale}
         value={rangeValue}
-        disabledDate={() => true}
-        picker="time"
-        showTime
+        showTime={{
+          defaultValue: [dayjs('2000-01-01 01:02:03'), dayjs('2000-01-01 05:06:07')],
+        }}
         changeOnBlur={false}
         showNow
         panelRender={(ori) => <>2333{ori}</>}
@@ -226,7 +227,7 @@ export default () => {
           start: 'inputStart',
           end: 'inputEnd',
         }}
-      /> */}
+      />
       <br />
 
       <button
diff --git a/src/PickerInput/hooks/useRangePickerValue.ts b/src/PickerInput/hooks/useRangePickerValue.ts
index b18b4988e..bce91c2bd 100644
--- a/src/PickerInput/hooks/useRangePickerValue.ts
+++ b/src/PickerInput/hooks/useRangePickerValue.ts
@@ -3,7 +3,7 @@ import useLayoutEffect from 'rc-util/lib/hooks/useLayoutEffect';
 import * as React from 'react';
 import type { GenerateConfig } from '../../generate';
 import type { InternalMode, Locale, PanelMode } from '../../interface';
-import { isSame } from '../../utils/dateUtil';
+import { fillTime, isSame } from '../../utils/dateUtil';
 import type { RangePickerProps } from '../RangePicker';
 
 export function offsetPanelDate<DateType = any>(
@@ -34,28 +34,6 @@ export function offsetPanelDate<DateType = any>(
 
 const EMPTY_LIST = [];
 
-/** Merge the `showTime.defaultValue` into `pickerValue` */
-function fillTimePickerValue<DateType>(
-  generateConfig: GenerateConfig<DateType>,
-  date: DateType,
-  timePickerValue?: DateType,
-) {
-  let tmpDate = date;
-
-  const getFn = ['getHour', 'getMinute', 'getSecond', 'getMillisecond'] as const;
-  const setFn = ['setHour', 'setMinute', 'setSecond', 'setMillisecond'] as const;
-
-  setFn.forEach((fn, index) => {
-    if (timePickerValue) {
-      tmpDate = generateConfig[fn](tmpDate, generateConfig[getFn[index]](timePickerValue));
-    } else {
-      tmpDate = generateConfig[fn](tmpDate, 0);
-    }
-  });
-
-  return tmpDate;
-}
-
 export default function useRangePickerValue<DateType extends object, ValueType extends DateType[]>(
   generateConfig: GenerateConfig<DateType>,
   locale: Locale,
@@ -100,7 +78,8 @@ export default function useRangePickerValue<DateType extends object, ValueType e
   // Current PickerValue
   const currentPickerValue = React.useMemo(
     () =>
-      fillTimePickerValue(
+      // Merge the `showTime.defaultValue` into `pickerValue`
+      fillTime(
         generateConfig,
         [mergedStartPickerValue, mergedEndPickerValue][mergedActiveIndex],
         timeDefaultValue[mergedActiveIndex],
diff --git a/src/PickerPanel/DateTimePanel/index.tsx b/src/PickerPanel/DateTimePanel/index.tsx
index c924ee0f9..a9bf8fc18 100644
--- a/src/PickerPanel/DateTimePanel/index.tsx
+++ b/src/PickerPanel/DateTimePanel/index.tsx
@@ -1,27 +1,46 @@
 import * as React from 'react';
 import useTimeInfo from '../../hooks/useTimeInfo';
 import type { SharedPanelProps } from '../../interface';
+import { fillTime } from '../../utils/dateUtil';
 import DatePanel from '../DatePanel';
 import TimePanel from '../TimePanel';
 
 export default function DateTimePanel<DateType extends object = any>(
   props: SharedPanelProps<DateType>,
 ) {
-  const { prefixCls, generateConfig, showTime, onSelect } = props;
+  const { prefixCls, generateConfig, showTime, onSelect, value, pickerValue, onHover } = props;
 
   const panelPrefixCls = `${prefixCls}-datetime-panel`;
 
-  // ============================== Select ==============================
+  // =============================== Time ===============================
   const [getValidTime] = useTimeInfo(generateConfig, showTime);
 
+  // Merge the time info from `value` or `pickerValue`
+  const mergeTime = (date: DateType) => {
+    if (value) {
+      return fillTime(generateConfig, date, value);
+    }
+
+    return fillTime(generateConfig, date, pickerValue);
+  };
+
+  // ============================== Hover ===============================
+  const onDateHover = (date: DateType) => {
+    onHover(date ? mergeTime(date) : date);
+  };
+
+  // ============================== Select ==============================
   const onDateSelect = (date: DateType) => {
-    onSelect(getValidTime(date, date));
+    // Merge with current time
+    const cloneDate = mergeTime(date);
+
+    onSelect(getValidTime(cloneDate, cloneDate));
   };
 
   // ============================== Render ==============================
   return (
     <div className={panelPrefixCls}>
-      <DatePanel {...props} onSelect={onDateSelect} />
+      <DatePanel {...props} onSelect={onDateSelect} onHover={onDateHover} />
       <TimePanel {...props} />
     </div>
   );
diff --git a/src/utils/dateUtil.ts b/src/utils/dateUtil.ts
index 912a280ff..9b90694f9 100644
--- a/src/utils/dateUtil.ts
+++ b/src/utils/dateUtil.ts
@@ -3,16 +3,6 @@ import type { CustomFormat, InternalMode, Locale, NullableDateType } from '../in
 
 export const WEEK_DAY_COUNT = 7;
 
-// export function isNullEqual<T>(value1: T, value2: T): boolean | undefined {
-//   if (!value1 && !value2) {
-//     return true;
-//   }
-//   if (!value1 || !value2) {
-//     return false;
-//   }
-//   return undefined;
-// }
-
 /**
  * Wrap the compare logic.
  * This will compare the each of value is empty first.
@@ -79,16 +69,6 @@ export function isSameMonth<DateType>(
   month1: NullableDateType<DateType>,
   month2: NullableDateType<DateType>,
 ) {
-  // const equal = isNullEqual(month1, month2);
-  // if (typeof equal === 'boolean') {
-  //   return equal;
-  // }
-
-  // return (
-  //   isSameYear(generateConfig, month1, month2) &&
-  //   generateConfig.getMonth(month1!) === generateConfig.getMonth(month2!)
-  // );
-
   return nullableCompare(
     month1,
     month2,
@@ -103,17 +83,6 @@ export function isSameDate<DateType>(
   date1: NullableDateType<DateType>,
   date2: NullableDateType<DateType>,
 ) {
-  // const equal = isNullEqual(date1, date2);
-  // if (typeof equal === 'boolean') {
-  //   return equal;
-  // }
-
-  // return (
-  //   generateConfig.getYear(date1!) === generateConfig.getYear(date2!) &&
-  //   generateConfig.getMonth(date1!) === generateConfig.getMonth(date2!) &&
-  //   generateConfig.getDate(date1!) === generateConfig.getDate(date2!)
-  // );
-
   return nullableCompare(
     date1,
     date2,
@@ -129,17 +98,6 @@ export function isSameTime<DateType>(
   time1: NullableDateType<DateType>,
   time2: NullableDateType<DateType>,
 ) {
-  // const equal = isNullEqual(time1, time2);
-  // if (typeof equal === 'boolean') {
-  //   return equal;
-  // }
-
-  // return (
-  //   generateConfig.getHour(time1!) === generateConfig.getHour(time2!) &&
-  //   generateConfig.getMinute(time1!) === generateConfig.getMinute(time2!) &&
-  //   generateConfig.getSecond(time1!) === generateConfig.getSecond(time2!)
-  // );
-
   return nullableCompare(
     time1,
     time2,
@@ -158,15 +116,6 @@ export function isSameTimestamp<DateType>(
   time1: NullableDateType<DateType>,
   time2: NullableDateType<DateType>,
 ) {
-  // return (
-  //   // Same object
-  //   time1 === time2 ||
-  //   // Date
-  //   (isSameDate(generateConfig, time1, time2) &&
-  //     isSameTime(generateConfig, time1, time2) &&
-  //     generateConfig.getMillisecond(time1) === generateConfig.getMillisecond(time2))
-  // );
-
   return nullableCompare(
     time1,
     time2,
@@ -183,18 +132,6 @@ export function isSameWeek<DateType>(
   date1: NullableDateType<DateType>,
   date2: NullableDateType<DateType>,
 ) {
-  // const equal = isNullEqual(date1, date2);
-  // if (typeof equal === 'boolean') {
-  //   return equal;
-  // }
-
-  // const weekStartDate1 = getWeekStartDate(locale, generateConfig, date1);
-  // const weekStartDate2 = getWeekStartDate(locale, generateConfig, date2);
-
-  // return (
-  //   isSameYear(generateConfig, weekStartDate1, weekStartDate2) &&
-  //   generateConfig.locale.getWeek(locale, date1) === generateConfig.locale.getWeek(locale, date2)
-  // );
   return nullableCompare(date1, date2, () => {
     const weekStartDate1 = getWeekStartDate(locale, generateConfig, date1);
     const weekStartDate2 = getWeekStartDate(locale, generateConfig, date2);
@@ -300,3 +237,27 @@ export function formatValue<DateType>(
     ? format(value)
     : generateConfig.locale.format(locale.locale, value, format);
 }
+
+/**
+ * Fill the time info into Date if provided.
+ */
+export function fillTime<DateType>(
+  generateConfig: GenerateConfig<DateType>,
+  date: DateType,
+  time?: DateType,
+) {
+  let tmpDate = date;
+
+  const getFn = ['getHour', 'getMinute', 'getSecond', 'getMillisecond'] as const;
+  const setFn = ['setHour', 'setMinute', 'setSecond', 'setMillisecond'] as const;
+
+  setFn.forEach((fn, index) => {
+    if (time) {
+      tmpDate = generateConfig[fn](tmpDate, generateConfig[getFn[index]](time));
+    } else {
+      tmpDate = generateConfig[fn](tmpDate, 0);
+    }
+  });
+
+  return tmpDate;
+}
diff --git a/tests/picker.spec.tsx b/tests/picker.spec.tsx
index a09fccec7..214451bd4 100644
--- a/tests/picker.spec.tsx
+++ b/tests/picker.spec.tsx
@@ -1287,10 +1287,36 @@ describe('Picker.Basic', () => {
       />,
     );
 
-    // console.log(document.body.innerHTML);
-
     expect(document.querySelector('.rc-picker-time-panel .rc-picker-header').textContent).toBe(
       '03:05:07',
     );
   });
+
+  it('select date should keep time with showTime', () => {
+    const onCalendarChange = jest.fn();
+    const { container } = render(<DayPicker showTime onCalendarChange={onCalendarChange} />);
+
+    openPicker(container);
+
+    // Select time column
+    selectColumn(0, 13);
+    expect(onCalendarChange).toHaveBeenCalledWith(
+      expect.anything(),
+      '1990-09-03 13:00:00',
+      expect.anything(),
+    );
+
+    // Hover date
+    const cell = findCell(18);
+    fireEvent.mouseEnter(cell);
+    expect(container.querySelector('input')).toHaveValue('1990-09-18 13:00:00');
+
+    // Click to trigger onChange
+    fireEvent.click(cell);
+    expect(onCalendarChange).toHaveBeenCalledWith(
+      expect.anything(),
+      '1990-09-18 13:00:00',
+      expect.anything(),
+    );
+  });
 });