My 96 year old father is so hard to get out of bed. He goes to bed at 8:30 and sleeps until 12:00 the following day. Any pointers?

I would encourage him to get up briefly in the morning to use the bathroom (or to change his incontinence wear) and to have a little bit to eat and drink, if he's like most people his age he probably has a medication schedule he should try to to keep as well, then he can go back to bed to nap until noon.