My mother was widowed for longer than she was married to my father and they were married over 30 years. She never took her rings off. Personally I only wear my wedding ring when I leave the house. I don’t know what I would do but it doesn’t seem strange to not wear it anymore.
When my mother died (married 57 years), my father had my sister take off the wedding and engagement rings in the hospital room; he then said she could keep them if she wanted, which she did. It wasn’t that he himself was especially sentimental about the rings, he just wanted to make sure that they didn’t either end up burned in the cremation, or in the pockets of the mortician. He continued to wear his own wedding ring for the rest of his life (6 more years).
As for my wedding ring (married 33 years so far) I’m pretty sure I would continue to wear it, on the same hand as now, if my husband died. I think it would help sustain me as I live out the rest of my life.
I don’t wear my ring much but if my husband died I imagine I’d start wearing it every day. I’m sentimental like that.
We’ve been married nearly 62 years and are currently 87 and about to be 89. I cannot imagine dating if she died and I see no reason to remove the ring. Incidentally, I could not move it to the right hand because the knuckle is too large. When I lost a lot of weight, the ring kept falling off and I moved it to the right hand where it fit perfectly. Then I had it resized and now it fits the left hand perfectly.
Age 70. Widower. Married 18 years. I still wear my custom wedding ring and likely will until I croak. It doesn’t look like your typical wedding band and I’ve always worn a ring on that finger of some sort.
…? Oh, right, those are your individual respective ages! I had a moment and could not for the life of me figure out how you were both expecting to jump from 87 directly to 89 without being 88 in the interim. 
I have both rings welded together in a slight angle by a jeweler to form a new ring. Wear it all the time.
Oh SNAP! 
Tangential story: my parents divorced in 1986, and when my mom died in 2015 I inherited her jewelry…including her wedding and engagement rings. A year or two later I had the idea to take the diamond from her engagement ring and turn into a solitaire pendant, but I checked with my dad first – even though they hadn’t been married for 30 years. I could have just done it, but symbols can be powerful things and “dead” is different from “divorced”; I felt compelled to make sure he was OK with my plan. Happily, he was. The resulting necklace is perfect (I splurged on platinum for the basket and chain), and I wear it quite often.
My dad died 23 years ago and I don’t know if my mom is wearing her wedding ring or not. I never paid attention.
I expect if I’m widowed, I’ll continue to wear my ring. Guess we’ll find out when/if it happens.
I moved my ring to my right hand pretty quickly. And when I started dating I took it off completely.