When creating a Vyte appointment, Vyte automatically adapts the time zone to the time zone of your Vyte account. You can, of course, change the appointment's time zone if you wish.
The time zone defined when creating the appointment will be the default time zone for the appointment.
However, if your guests don't have the same time zone as the one defined for the appointment, Vyte will detect this and convert the time in the date/time options to their time zone.
In this way, you and your guests will be able to see each date/time option according to your time zone and their time zones.
Regarding email notifications of appointments:
If your guests have a Vyte account, Vyte will send the email notification in their preferred language and time zone (depending on the Vyte account settings).
If your guests are not Vyte users, notification emails will be sent in the event's language and time zone