Actually: You do.
If you don't take the RMD, the people that inherit it DO have to take it. From a tax perspective, it's better if the actual IRA owner takes it rather than several inheritors each having to take an RMD out of their share. (I believe if one of them doesn't do it, there are consequences for all. I might be wrong on that part.)
Yes this is my understanding as well. If there is no penalty or other reason not to, then I would like to have him take it in June or July, or even earlier. I don't want him to do it every December, as it would be difficult to be grieving and have to rush rush rush to get all this organized.
The reason to wait to the end of the year is to allow the money to work harder in the tax sheltered IRA. It is to your father's benefit to wait to the end of the year before taking an RMD.
I'm saying this in the nicest possible way tho: Unless your dad is in hospice or something right now and going to die soon (in which case, I'm very sorry), worrying him about taxes and RMD timing right now - not for his sake but because you want to streamline things for your own inheritance - is morbid and a little disturbing.
You'll know this stuff now in the back of your mind and can deal with it when it happens. The only reason the RMD timing would be any kind of an issue is if your dad dies before taking his RMD
and it is right at the end of the year - which is just such a small possibility in itself it seems odd to be worrying over this scenario right now. But all you do is alert the executor of his estate, and they'll figure it out. And if that's you, then you contact the financial group directly, have them do the RMD and put it in a holding account, and that is if his accounts don't already have an automatic distribution schedule (which will happen on the date he designated even if he died). All financial groups that work with IRAs are very aware of RMDs and what needs to be done and can tell you exactly what to do to get things done on time.
I loved my dad very much and losing him was just awful, and he did die in the month of December, but we were able to drag ourselves to make funeral arrangements and make many, many phone calls to get things in motion in the days after his death. You do what you have to do.