How can I deal with evening restlessness?

Might he enjoy needlepoint or crocheting.....the repetitive motions can be very calming. When I spent time in hospitals with mother,father, brother, I couldn't concentrate on reading (too nervous) so I starting doing needlework and it was a very soothing activity in a stressful setting. I've also brought small "projects" when traveling, sitting around airports waiting for connecting flights or flight delays.

Does your residence have an exercise room? Would he walk on a treadmill or use a recumbent bike?
Does he like music? Could you dance?
Would he color? There are adult coloring books.
You said he doesn't like puzzles. Have you tried any for people with dementia? Usually 16 - 100 pieces?
Would working on some kind of model appeal to him?
Are there tasks you could give him like folding laundry?
Maybe speak to your doctor about melatonin to help calm him down, or something else...
Does he sleep well through the night?
Sorry for all the questions...
We have dinner at five, then my husband rests for a while. He gets up to do the dishes, then we have dessert. He gets ready for bed around 7 and sleeps through the night.

You have been very helpful. Knowing that him going to bed at 7 o’clock and sleeping through the night is a good thing is helpful. I thought going to bed at seven was too early, but at this point, he does sleep through the night and I pray it will continue.
I wish we had equipment here. I’m hoping they will get some soon. They have one type of bike that he does not enjoy, but he does like working out on equipment.
I will also try some of the other options.

Things can always change, and it's best for us to learn to roll with the changes.
The neurologist told me the brain needs time to rest. I asked him about my husband sleeping and napping so much.
I bought him some new shoes and he loves them. It was hard to get him to walk much before, but now he loves to walk and threatens to go without me - so we're walking a few times a day.
Cleaning the house can wait, I guess!

What brand shoes did you buy? My husband will walk, but he needs new shoes.

They are Fitville Diabetic Extra Wide. You can go online to see the seller.
My husband isn't diabetic, but he has bunions and a hammer toe. The shoes he loves have velcro openings on both sides. I did return a pair that were slip ins, no velcro, which he didn't like.
He's also done okay with Skecher's wide in the past, but he raves about the Fitvilles.

Thanks! I'll look into it.

Lucky you.

Believe me, @wcdoc1943, I know I have it pretty easy now, compared to most. My father had Sundowner's syndrome and it was very difficult for my mother, who had to hire aids to help her manage him.

And I didn't mean to come across as flippant. You are fortunate for now. Some patients are pretty calm and happy (I call them "ditzy") and others can be restless and agitated and downright mean. I'm a retired physician and I've seen a lot of this. But it sure is diffeent being on the other side of the desk-LOL.