For adjusting the time, turn the knob (right to increase and left to decrease) on the cluster. There are two of them, your going to be working with the RIGHT one. Left one is to set your kms to 0.
Press it to change from 12h clock to 24.
And about the CDs, I'm not sure. All/most of my burnt CDs worked, until my cd player broke... Now I just use the aux cable
Just remembered this from the top of my head and I'm quite il, so pardon moi if I'm wrong.