How about a personalized crossword puzzle book? You could create a crossword puzzle book with personalized clues that are specific to your relationship. You can include personal jokes, memories, and things that you both love. Another option would be to buy him a subscription to a crossword puzzle magazine or a book with crossword puzzles from famous newspapers. He could enjoy these puzzles and challenge himself, all while thinking of you as the person who got him this amazing gift.
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.