If your clock is already set to the right time, the website is likely misconfigured, and there is nothing you can do to resolve the issue. You can notify the website’s administrator about the problem.
Si l'hora del rellotge és correcta, és probable que el lloc web estigui mal configurat i no hi podeu fer res per resoldre-ho. Podeu notificar el problema a l'administrador del lloc web.