Wear it as long as you wish. It isn’t for the surviving spouse to change hands upon which the ring is located. Move it from left hand to right hand and leave it there forever.
If my wife should predeceased me, I would move my wedding ring from my right hand (traditional for Orthodox Christians although many follow local custom and wear on the left) and move it to my left. I would take my family ring and move it to my right (started wearing a family ring to keep locals from thinking I’m a widower). My wedding ring would stay on me through death and on my finger in a casket. The only change I might have done is to swap rings at death.
Wear the ring. It reminds you of her. May her memory be eternal
It is uncommon for the surviving spouse to change hands upon which the ring is located.
Fiex above error
West: left hand wedding, right hand widowed
East: right hand wedding, left hand widowed