Assuming your listing is done and saved...
>Check the little box next to whatever listings you want to use and then click on the blue 'schedule 'button
>You will see a calender for your date and the times. (Remember it's ebay CA time PST)Enter what you want. The page usually refreshes after each click.
>Then click on 'apply changes' button
>Click on 'schedule' and you're done!
Even if I missed a step (I'm trying to remember without having it right in front of me) You'll be able to figure it out. You can do a bunch of listings at once, or one at a time.
Good luck!