One idea could be to create a Stranger Things-themed date night. You could start by preparing her favorite food (maybe even waffles, like Eleven likes), and then binge-watch her favorite episodes together while indulging in her favorite snacks.
Another idea could be to get her a Stranger Things-inspired t-shirt, hoodie or jacket. There are several online shops that offer Stranger Things merchandise.
Lastly, you could buy her a Stranger Things-inspired poster or artwork to decorate her room. This could be a great way to celebrate your anniversary and show your girlfriend you pay attention to her interests.
Or you can get her a star map with the date of your anniversary.
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.