One idea could be to give your friend a collection of their favorite thriller movies or a subscription to a streaming service, which offers them access to a large selection of thriller movies. You could also get them a book by their favorite thriller author or one of the highly-rated ones. Additionally, you could plan a movie night and select some of their favorite thriller movies to watch together, perhaps with some snacks and drinks to make it a little more festive.
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.