diff --git a/superset-frontend/src/explore/components/controls/DateFilterControl/frame/AdvancedFrame.tsx b/superset-frontend/src/explore/components/controls/DateFilterControl/frame/AdvancedFrame.tsx
index f5ae9446c20..3daddf07293 100644
--- a/superset-frontend/src/explore/components/controls/DateFilterControl/frame/AdvancedFrame.tsx
+++ b/superset-frontend/src/explore/components/controls/DateFilterControl/frame/AdvancedFrame.tsx
@@ -20,6 +20,7 @@ import React from 'react';
 import { t } from '@superset-ui/core';
 import { SEPARATOR } from 'src/explore/dateFilterUtils';
 import { Input } from 'src/common/components';
+import { InfoTooltipWithTrigger } from '@superset-ui/chart-controls';
 import { FrameComponentProps } from '../types';
 import DateFunctionTooltip from './DateFunctionTooltip';
 
@@ -59,13 +60,25 @@ export function AdvancedFrame(props: FrameComponentProps) {
           <i className="fa fa-info-circle text-muted" />
         </DateFunctionTooltip>
       </div>
-      <div className="control-label">{t('START')}</div>
+      <div className="control-label">
+        {t('START (INCLUSIVE)')}{' '}
+        <InfoTooltipWithTrigger
+          tooltip={t('Start date included in time range')}
+          placement="right"
+        />
+      </div>
       <Input
         key="since"
         value={since}
         onChange={e => onChange('since', e.target.value)}
       />
-      <div className="control-label">{t('END')}</div>
+      <div className="control-label">
+        {t('END (EXCLUSIVE)')}{' '}
+        <InfoTooltipWithTrigger
+          tooltip={t('End date excluded from time range')}
+          placement="right"
+        />
+      </div>
       <Input
         key="until"
         value={until}
diff --git a/superset-frontend/src/explore/components/controls/DateFilterControl/frame/CustomFrame.tsx b/superset-frontend/src/explore/components/controls/DateFilterControl/frame/CustomFrame.tsx
index cfc5d4853ef..3a760f1cb00 100644
--- a/superset-frontend/src/explore/components/controls/DateFilterControl/frame/CustomFrame.tsx
+++ b/superset-frontend/src/explore/components/controls/DateFilterControl/frame/CustomFrame.tsx
@@ -23,6 +23,7 @@ import { isInteger } from 'lodash';
 import { Col, DatePicker, InputNumber, Row } from 'src/common/components';
 import { Radio } from 'src/common/components/Radio';
 import { Select } from 'src/components/Select';
+import { InfoTooltipWithTrigger } from '@superset-ui/chart-controls';
 import {
   SINCE_GRAIN_OPTIONS,
   SINCE_MODE_OPTIONS,
@@ -110,7 +111,13 @@ export function CustomFrame(props: FrameComponentProps) {
       <div className="section-title">{t('Configure custom time range')}</div>
       <Row gutter={24}>
         <Col span={12}>
-          <div className="control-label">{t('START')}</div>
+          <div className="control-label">
+            {t('START (INCLUSIVE)')}{' '}
+            <InfoTooltipWithTrigger
+              tooltip={t('Start date included in time range')}
+              placement="right"
+            />
+          </div>
           <Select
             options={SINCE_MODE_OPTIONS}
             value={SINCE_MODE_OPTIONS.filter(
@@ -162,7 +169,13 @@ export function CustomFrame(props: FrameComponentProps) {
           )}
         </Col>
         <Col span={12}>
-          <div className="control-label">{t('END')}</div>
+          <div className="control-label">
+            {t('END (EXCLUSIVE)')}{' '}
+            <InfoTooltipWithTrigger
+              tooltip={t('End date excluded from time range')}
+              placement="right"
+            />
+          </div>
           <Select
             options={UNTIL_MODE_OPTIONS}
             value={UNTIL_MODE_OPTIONS.filter(