One idea could be to purchase a unique crypto-art piece as a wedding gift. There are many online marketplaces specifically for crypto-art, such as SuperRare, Nifty Gateway, or KnownOrigin. You could browse through the available artwork to find a piece that would appeal to your friend's personal taste, perhaps with colors or themes that remind them of their wedding day. Another option could be to commission a custom crypto-art piece featuring a personalized message or design specifically for the couple. It will be a unique and meaningful gift that they can display in their home together for years to come.
Or you can get her/him a star map with the date of the wedding.
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.