Congrats on making it to the Championships in your first year!
Unlike Regionals, the Championship Event starts Wednesday afteroon (4PM) for robot load in. You will also be given 4.5 hours (I believe that is the correct number) to work on your robot and get through inspection as part of that time.
A full schedule can be found
here
More information on the Championships can be found
here
If you have any questions about how Championships operate, feel free to ask.