Live events occur weekly beginning on Friday morning. Once the event is no longer open to competitors, it changes into a token exchange on Thursday. Tokens you have collected can be used until the next event starts on Friday morning when all unused tokens will be removed.
Token exchange can be accessed throughout the week; however, you might want to wait until Thursday to have all your tokens available for exchange. Please remember to use as many tokens as possible, as those do not transfer to the next event!