diff --git a/src/components/Dashboard/common/ObjectProperty.jsx b/src/components/Dashboard/common/ObjectProperty.jsx
index 7c4186f..4eac600 100644
--- a/src/components/Dashboard/common/ObjectProperty.jsx
+++ b/src/components/Dashboard/common/ObjectProperty.jsx
@@ -6,11 +6,11 @@ import {
   InputNumber,
   Form,
   Select,
-  DatePicker,
   Switch
 } from 'antd'
 import IdDisplay from './IdDisplay'
 import TimeDisplay from './TimeDisplay'
+import TimeEdit from './TimeEdit'
 import dayjs from 'dayjs'
 import EmailDisplay from './EmailDisplay'
 import UrlDisplay from './UrlDisplay'
@@ -51,6 +51,10 @@ import { round } from '../utils/Utils'
 
 const { Text } = Typography
 
+const timeEditFormItemProps = {
+  getValueProps: (v) => ({ value: v ? dayjs(v) : null })
+}
+
 const ObjectProperty = ({
   type = 'text',
   prefix,
@@ -708,14 +712,7 @@ const ObjectProperty = ({
             />
           )
         case 'dateTime':
-          return (
-            <DatePicker
-              showTime
-              style={{ width: '100%' }}
-              {...inputProps}
-              {...(useFormItem ? {} : { value: value ? dayjs(value) : null })}
-            />
-          )
+          return <TimeEdit {...inputProps} />
         case 'country':
           return <CountrySelect {...inputProps} />
         case 'color':
@@ -854,9 +851,7 @@ const ObjectProperty = ({
         {...(type === 'color'
           ? { valuePropName: 'value', getValueFromEvent: (v) => v }
           : {})}
-        {...(type === 'dateTime'
-          ? { getValueProps: (v) => ({ value: v ? dayjs(v) : null }) }
-          : {})}
+        {...(type === 'dateTime' ? timeEditFormItemProps : {})}
       >
         {renderInput()}
       </Form.Item>
diff --git a/src/components/Dashboard/common/TimeEdit.jsx b/src/components/Dashboard/common/TimeEdit.jsx
new file mode 100644
index 0000000..1bc380a
--- /dev/null
+++ b/src/components/Dashboard/common/TimeEdit.jsx
@@ -0,0 +1,180 @@
+import { useState, useRef } from 'react'
+import PropTypes from 'prop-types'
+import { DatePicker, Input } from 'antd'
+import dayjs from 'dayjs'
+import FunctionIcon from '../../Icons/FunctionIcon'
+
+const OPERATOR_KEYS = ['+', '-']
+
+const TIME_UNITS = {
+  s: 'second',
+  m: 'minute',
+  h: 'hour',
+  d: 'day',
+  w: 'week',
+  M: 'month',
+  y: 'year'
+}
+
+const TERM_REGEX = /([+-])(\d+(?:\.\d+)?)([smhdwMy])/g
+const RELATIVE_TERM_START = /[+-]\d+(?:\.\d+)?[smhdwMy]/
+const DATE_EXPR_FORMAT = 'YYYY-MM-DD HH:mm:ss'
+
+function formatExprBase(date) {
+  if (date == null || !dayjs(date).isValid()) return ''
+  return dayjs(date).format(DATE_EXPR_FORMAT)
+}
+
+function applyTimeExpr(fallbackBase, expr) {
+  const trimmed = String(expr).trim()
+  if (!trimmed) return null
+
+  const termStart = trimmed.search(RELATIVE_TERM_START)
+  if (termStart === -1) return null
+
+  let base
+  let termsPart
+
+  if (termStart === 0) {
+    base =
+      fallbackBase && dayjs(fallbackBase).isValid()
+        ? dayjs(fallbackBase)
+        : dayjs()
+    termsPart = trimmed
+  } else {
+    const baseStr = trimmed.slice(0, termStart).trim()
+    const parsed = dayjs(baseStr)
+    base = parsed.isValid()
+      ? parsed
+      : fallbackBase && dayjs(fallbackBase).isValid()
+        ? dayjs(fallbackBase)
+        : dayjs()
+    termsPart = trimmed.slice(termStart)
+  }
+
+  const termsStr = termsPart.replace(/\s/g, '')
+  const terms = [...termsStr.matchAll(TERM_REGEX)]
+  if (!terms.length) return null
+
+  const consumed = terms.map((t) => t[0]).join('')
+  if (consumed !== termsStr) return null
+
+  let result = base
+  for (const [, sign, amount, unit] of terms) {
+    const unitKey = TIME_UNITS[unit]
+    if (!unitKey) return null
+    const delta = sign === '+' ? parseFloat(amount) : -parseFloat(amount)
+    result = result.add(delta, unitKey)
+  }
+
+  return result
+}
+
+const TimeEdit = ({
+  value,
+  onChange,
+  onBlur,
+  disabled,
+  ...rest
+}) => {
+  const [isExprMode, setIsExprMode] = useState(false)
+  const [exprValue, setExprValue] = useState('')
+  const inputRef = useRef(null)
+
+  const dayjsValue =
+    value == null ? null : dayjs.isDayjs(value) ? value : dayjs(value)
+  const pickerValue =
+    dayjsValue && dayjsValue.isValid() ? dayjsValue : null
+
+  const switchToExprMode = (initialValue) => {
+    setIsExprMode(true)
+    setExprValue(initialValue)
+    setTimeout(() => {
+      const input = inputRef.current?.getElementsByTagName('input')[0]
+      input?.focus()
+    }, 0)
+  }
+
+  const exitExprMode = (result) => {
+    setIsExprMode(false)
+    setExprValue('')
+    if (result != null && result.isValid()) {
+      onChange?.(result)
+    }
+  }
+
+  const commitExpr = () => {
+    const expr = exprValue.trim()
+    if (expr && expr.match(/[+-]/) && expr.match(/[smhdwMy]/)) {
+      const result = applyTimeExpr(pickerValue, expr)
+      if (result != null) {
+        exitExprMode(result)
+        return
+      }
+    }
+    exitExprMode(null)
+  }
+
+  const handleDatePickerKeyDown = (e) => {
+    if (OPERATOR_KEYS.includes(e.key)) {
+      e.preventDefault()
+      e.stopPropagation()
+      switchToExprMode(formatExprBase(pickerValue) + e.key)
+    }
+  }
+
+  const handleInputKeyDown = (e) => {
+    if (e.key === 'Enter' || e.key === '=') {
+      e.preventDefault()
+      const result = applyTimeExpr(pickerValue, exprValue)
+      if (result != null) {
+        exitExprMode(result)
+      }
+    }
+  }
+
+  const handleInputBlur = (e) => {
+    commitExpr()
+    onBlur?.(e)
+  }
+
+  if (isExprMode) {
+    return (
+      <div className='input-number-cal' ref={inputRef}>
+        <Input
+          value={exprValue}
+          onChange={(e) => setExprValue(e.target.value)}
+          onKeyDown={handleInputKeyDown}
+          onBlur={handleInputBlur}
+          disabled={disabled}
+          placeholder='+1d, -2m, +1h'
+          style={{ width: '100%' }}
+        />
+        <div className='input-number-cal-icon'>
+          <FunctionIcon style={{ fontSize: 24 }} />
+        </div>
+      </div>
+    )
+  }
+
+  return (
+    <DatePicker
+      showTime
+      style={{ width: '100%' }}
+      value={pickerValue}
+      onChange={onChange}
+      onKeyDown={handleDatePickerKeyDown}
+      disabled={disabled}
+      {...rest}
+    />
+  )
+}
+
+TimeEdit.propTypes = {
+  value: PropTypes.oneOfType([PropTypes.string, PropTypes.object]),
+  onChange: PropTypes.func,
+  onBlur: PropTypes.func,
+  disabled: PropTypes.bool
+}
+
+export default TimeEdit