How about getting your dad a book on Surrealism? You could look for a comprehensive guide that includes information on the history and major artists of the movement. If he's already well-versed in Surrealism, consider finding a rare or lesser-known book on the topic.
You could also get him a framed print or reproduction of a famous Surrealist work of art, such as Salvador Dali's "The Persistence of Memory" or Rene Magritte's "The Treachery of Images". He could display it in his office, bedroom, or any room in the house.
If he's more hands-on and likes to create, you could purchase a surrealist drawing kit or a book of drawing prompts to encourage his own artistic expression. Or, you could try signing him up for a Surrealist art class or workshop in your area.
Or you can get him a star map with the date when he welcomed you in this world.
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.