What about a membership to a non-fiction book club? This could include a monthly delivery of non-fiction books that align with their interests. Alternatively, you could find books on a topic they enjoy and create a gift basket filled with a few of these books, a cozy blanket, and some snacks for a perfect night in reading.
Or you can get her/him a star map with an important date you share.
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.