Scheduler: Update Time Zone Support demo desc. (#30916)

Author: arman-boyakhchyan

apps/demos/Demos/Scheduler/TimeZonesSupport/description.md

@@ -1,6 +1,6 @@
-The Scheduler allows its users to view appointments in different time zones. Set the [timeZone](/Documentation/ApiReference/UI_Components/dxScheduler/Configuration/#timeZone) property to specify the current time zone. This property accepts values from the <a href="https://en.wikipedia.org/wiki/List_of_tz_database_time_zones" target="_blank">IANA time zone database</a>.
-
-In this demo, you can use the drop-down menu above the Scheduler to choose between the London, Berlin, and Helsinki time zones. To populate the menu, the [getTimeZones](/Documentation/ApiReference/Common/Utils/utils/#getTimeZonesdate) utility method is used. It returns a list of all IANA time zones that is then filtered.
+Our DevExtreme Scheduler allows you to specify time zones for the component and its appointments. In this demo, you can change the component time zone using the [SelectBox](/Documentation/Guide/UI_Components/SelectBox/Overview/) above the Scheduler. A [getTimeZones()](/Documentation/ApiReference/Common/Utils/utils/#getTimeZonesdate_timeZones) method call populates the SelectBox with values.
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-Users can edit the time zones of individual appointments in the appointment details form. To enable this functionality, set the **editing**.[allowTimeZoneEditing](/Documentation/ApiReference/UI_Components/dxScheduler/Configuration/editing/#allowTimeZoneEditing) property to **true**. Information about individual time zones is saved in the [startDateTimeZone](/Documentation/ApiReference/UI_Components/dxScheduler/Interfaces/dxSchedulerAppointment/#startDateTimeZone) and [endDateTimeZone](/Documentation/ApiReference/UI_Components/dxScheduler/Interfaces/dxSchedulerAppointment/#endDateTimeZone) fields of the appointment data objects.
+To define the time zone on the component level, assign an <a href="https://en.wikipedia.org/wiki/List_of_tz_database_time_zones" target="_blank">IANA time zone</a> value to the [timeZone](/Documentation/ApiReference/UI_Components/dxScheduler/Configuration/#timeZone) property.
+
+To change time zones for appointments, enable the **editing**.[allowTimeZoneEditing](/Documentation/ApiReference/UI_Components/dxScheduler/Configuration/editing/#allowTimeZoneEditing) option. Our Scheduler supports different time zones for appointment start and end dates ([startDateTimeZone](/Documentation/ApiReference/UI_Components/dxScheduler/Interfaces/dxSchedulerAppointment/#startDateTimeZone) and [endDateTimeZone](/Documentation/ApiReference/UI_Components/dxScheduler/Interfaces/dxSchedulerAppointment/#endDateTimeZone) appointment properties).