Changing birth control time?

Laura
Hi everyone! 
I'll be starting college soon. My classes will end at 9:30pm and I usually take my pill at 9:00pm. I am supposed to start a new pack tomorrow, and I was wondering if I could change the time to 10:00pm instead?
Can I do it since is a new pack? Will I need to use condoms as back up? Has anybody done this before? 
Please any advice will be much appreciated.
Thanks!