How about gifting your dad a philosophy book by one of his favorite philosophers, such as "Meditations" by Marcus Aurelius, "Beyond Good and Evil" by Friedrich Nietzsche or "The Republic" by Plato? Or you could also look for a personalized journal with philosophical quotes or a wooden engraved bookmark with a philosophy quote on it. Additionally, you could inquire about any upcoming philosophy conferences or events that he is interested in attending and gift him tickets.
Or you can get him a star map with the date when he was born.
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.