diff --git a/e2e/testcafe-devextreme/tests/accessibility/scheduler/appointment.ts b/e2e/testcafe-devextreme/tests/accessibility/scheduler/appointment.ts
index 0448bd27a40b..b30219a4bc03 100644
--- a/e2e/testcafe-devextreme/tests/accessibility/scheduler/appointment.ts
+++ b/e2e/testcafe-devextreme/tests/accessibility/scheduler/appointment.ts
@@ -431,7 +431,7 @@ test('Scheduler a11y: appointments does not have info about reccurence', async (
 test('Scheduler a11y: Appointment collector button doesn\'t have info about date', async (t) => {
   const scheduler = new Scheduler('#container');
   const schedulerCollector = scheduler.collectors.get(0);
-  const dateText = 'March 6, 2021';
+  const dateText = 'March 5, 2021';
 
   await t
     .expect(scheduler.element().exists)
diff --git a/e2e/testcafe-devextreme/tests/scheduler/timezones/appointmentCollectorTimezone.ts b/e2e/testcafe-devextreme/tests/scheduler/timezones/appointmentCollectorTimezone.ts
new file mode 100644
index 000000000000..f5799160193d
--- /dev/null
+++ b/e2e/testcafe-devextreme/tests/scheduler/timezones/appointmentCollectorTimezone.ts
@@ -0,0 +1,57 @@
+import Scheduler from 'devextreme-testcafe-models/scheduler';
+import { createWidget } from '../../../helpers/createWidget';
+import { getTimezoneTest, MACHINE_TIMEZONES } from '../../../helpers/machineTimezones';
+import url from '../../../helpers/getPageUrl';
+
+fixture.disablePageReloads`Scheduler - Appointment Collector Timezone`
+  .page(url(__dirname, '../../container.html'));
+
+[
+  MACHINE_TIMEZONES.EuropeBerlin,
+].forEach((machineTimezone) => {
+  getTimezoneTest([machineTimezone])(
+    'Appointment collector button should have correct date',
+    async (t) => {
+      const scheduler = new Scheduler('#container');
+      const schedulerCollector = scheduler.collectors.get(0);
+      const expectedDate = 'March 5, 2021';
+
+      const ariaRoleDescription = await schedulerCollector.element().getAttribute('aria-roledescription');
+
+      await t
+        .expect(scheduler.element().exists)
+        .ok()
+        .expect(ariaRoleDescription)
+        .contains(expectedDate, `Collector should display ${expectedDate} after timezone conversion`);
+    },
+  ).before(async () => {
+    await createWidget('dxScheduler', {
+      timeZone: 'America/Los_Angeles',
+      dataSource: [
+        {
+          text: 'Website Re-Design Plan',
+          startDate: new Date('2021-03-05T15:30:00.000Z'),
+          endDate: new Date('2021-03-05T17:00:00.000Z'),
+        },
+        {
+          text: 'Complete Shipper Selection Form',
+          startDate: new Date('2021-03-05T15:30:00.000Z'),
+          endDate: new Date('2021-03-05T17:00:00.000Z'),
+        },
+        {
+          text: 'Upgrade Server Hardware',
+          startDate: new Date('2021-03-05T19:00:00.000Z'),
+          endDate: new Date('2021-03-05T21:15:00.000Z'),
+        },
+        {
+          text: 'Upgrade Personal Computers',
+          startDate: new Date('2021-03-05T23:45:00.000Z'),
+          endDate: new Date('2021-03-06T01:30:00.000Z'),
+        },
+      ],
+      currentView: 'month',
+      currentDate: new Date(2021, 2, 1),
+      maxAppointmentsPerCell: 3,
+    });
+  });
+});
diff --git a/packages/devextreme/js/__internal/scheduler/m_compact_appointments_helper.ts b/packages/devextreme/js/__internal/scheduler/m_compact_appointments_helper.ts
index 19e7db48c384..e13db784c4cf 100644
--- a/packages/devextreme/js/__internal/scheduler/m_compact_appointments_helper.ts
+++ b/packages/devextreme/js/__internal/scheduler/m_compact_appointments_helper.ts
@@ -4,9 +4,11 @@ import messageLocalization from '@js/common/core/localization/message';
 import $, { type dxElementWrapper } from '@js/core/renderer';
 import { FunctionTemplate } from '@js/core/templates/function_template';
 import Button from '@js/ui/button';
+import type { Appointment } from '@js/ui/scheduler';
 
 import { APPOINTMENT_SETTINGS_KEY, LIST_ITEM_CLASS, LIST_ITEM_DATA_KEY } from './constants';
-import type { AppointmentTooltipItem, CompactAppointmentOptions } from './types';
+import type Scheduler from './m_scheduler';
+import type { AppointmentTooltipItem, CompactAppointmentOptions, TargetedAppointment } from './types';
 
 const APPOINTMENT_COLLECTOR_CLASS = 'dx-scheduler-appointment-collector';
 const COMPACT_APPOINTMENT_COLLECTOR_CLASS = `${APPOINTMENT_COLLECTOR_CLASS}-compact`;
@@ -15,7 +17,10 @@ const APPOINTMENT_COLLECTOR_CONTENT_CLASS = `${APPOINTMENT_COLLECTOR_CLASS}-cont
 export class CompactAppointmentsHelper {
   elements: any[] = [];
 
-  constructor(public instance) {
+  instance: Scheduler;
+
+  constructor(instance: Scheduler) {
+    this.instance = instance;
   }
 
   render(options: CompactAppointmentOptions): dxElementWrapper {
@@ -43,6 +48,7 @@ export class CompactAppointmentsHelper {
     const $button = $(e.element);
     this.instance.showAppointmentTooltipCore(
       $button,
+      // @ts-expect-error
       $button.data('items'),
       this._getExtraOptionsForTooltip(options, $button),
     );
@@ -97,6 +103,7 @@ export class CompactAppointmentsHelper {
   _createCompactButton(template, options: CompactAppointmentOptions) {
     const $button = this._createCompactButtonElement(options);
 
+    // @ts-expect-error
     return this.instance._createComponent($button, Button, {
       type: 'default',
       width: options.width,
@@ -109,7 +116,10 @@ export class CompactAppointmentsHelper {
   _createCompactButtonElement({
     isCompact, $container, coordinates, sortedIndex, items,
   }: CompactAppointmentOptions) {
-    const appointmentDate = this._getDateText(items[0].appointment);
+    const appointmentDate = this._getDateText(
+      items[0].appointment,
+      items[0].targetedAppointment,
+    );
     const result = $('<div>')
       .addClass(APPOINTMENT_COLLECTOR_CLASS)
       .attr('aria-roledescription', appointmentDate)
@@ -159,26 +169,18 @@ export class CompactAppointmentsHelper {
     return `${dateLocalization.format(date, 'monthAndDay')}, ${dateLocalization.format(date, 'year')}`;
   }
 
-  _getStartDate(appointment) {
-    const date = appointment.startDate;
-    return date ? new Date(date) : null;
-  }
-
-  _getEndDate(appointment) {
-    const date = appointment.endDate;
-    return date ? new Date(date) : null;
-  }
+  _getDateText(
+    appointment: Appointment,
+    targetedAppointment: Appointment | TargetedAppointment | undefined,
+  ): string {
+    const startDate = targetedAppointment?.displayStartDate ?? appointment.startDate;
+    const endDate = targetedAppointment?.displayEndDate ?? appointment.endDate;
 
-  _getDateText(appointment) {
-    const startDate = this.instance._dataAccessors.get('startDate', appointment);
-    const endDate = this.instance._dataAccessors.get('endDate', appointment);
-    const startDateText = startDate ? this._localizeDate(startDate) : '';
-    const endDateText = endDate ? this._localizeDate(endDate) : '';
+    const startDateText = this._localizeDate(startDate);
+    const endDateText = this._localizeDate(endDate);
 
-    const dateText = startDateText === endDateText
-      ? `${startDateText}`
+    return startDateText === endDateText
+      ? startDateText
       : `${startDateText} - ${endDateText}`;
-
-    return `${dateText}`;
   }
 }