You can see the validity period of the ticket at the moment of purchasing the Ticket, after clicking "Buy Ticket" and after purchasing in the "Tickets" view on your account. You can also see the ticket validity period in the Ticket confirmation letter sent to your e-mail address.
The validity period is set by the Service Provider and this means, that the Ticket must be used before the given date and after the expiry date, the given Ticket can no longer be used by the Service Provider. Please keep track of how long your Ticket is valid!
If you are unable to use the Ticket before it expires, contact the Service Provider. Stebby team cannot extend the Tickets and only the Service Provider from whom you purchased the Ticket has the option to extend the Tickets, if needed. Stebby will send you three reminders about the expiration of your ticket (14, 7 days and 1 day before the expiration) once you have enabled these notifications in your account.