Any way to change days with pre-ordered tickets?

[neopifex]

My GF bought tickets for Saturday but it turns out we can't make it that day. Is there any way to exchange tickets for Sunday? If we show up Sunday and pick up our Saturday tickets, will they let us use them that day, since we won't have had access to them on Saturday? I'm not worried about a refund for the price difference, I just really don't want to have to buy a second pair of tickets.

[MrJBRPG]

I believe the next time you pre-order the tickets, you should use the contact form from the California Extreme website in regards to the change in schedule. Make sure to have your order history ready as proof of purchase.

I haven't had any problems with schedule because nothing came in the way suddenly. I wish I could help you more.