演出日之14天可以退票。Tickets can be changed or cancelled not later than 14 (fourteen) days before the event date. If it is less than 14 (fourteen) days before the performance, the ticketscannot be returned or changed. In case of cancellation, you will receive full refund. https://www.mariinsky-theatre.com/help/#cancellations
https://www.mariinsky-theatre.com/help/#cancellations