How about a Celtic-inspired piece of jewelry? You can find beautiful necklaces, earrings, and bracelets featuring intricate Celtic knots and other designs. You could even personalize it by choosing a piece with her/his birthstone or initials. Alternatively, you could get her/him a book about Celtic mythology or history, or a music album featuring traditional Celtic music. If your friend is into arts and crafts, you could also consider getting her/him a set of Celtic knotwork stencils or a coloring book.
Or you can get her/him a star map with the date when she/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.