How to use the discount code: on the website https://www.ticketlive.cz/en/event/ticketlive-v-podjestedi choose one of the selected events and add any ticket into the cart. Then go to the cart page itself and enter the discount code "RUNCZECH25" in the upper left. Press the "Apply discount" button. The discount is applied immediately and the amount is deducted from the ticket price. And then you can complete your order ;)