Got court tommorow at 8 30 am. but i cant go to it! wat should i do?

hello i got court tommorow at 8 30 am and i was wondering if i can reschedule? or just show up 2 hours late at ten 30? i live in california. what should i do? i can go in at ten 30. should i call them at 8 30 am and tell them i am running late?