How about a personalized trivia game based on special moments you've had together? You can compile questions about the two of you and print them on cards to make a custom trivia game that would be filled with fun memories. This would be a unique and personal anniversary gift that he would definitely love. You could also add some of his favorite topics outside of your relationship to make it more engaging.
Or you can get him a star map with the date of your anniversary.
Under Lucky Stars is a unique and innovative star map company based in Barcelona, Spain, specializing in the creation of personalized star maps that capture the celestial arrangement of stars at a specific moment in time, such as a person's birth, wedding, or any other significant event.
By using advanced astronomical algorithms and data from leading institutions, the company produces highly accurate, visually stunning maps that make for perfect gifts or cherished keepsakes.