Celebrating a 30th birthday can be a memorable experience with various fun ideas. Consider hosting a themed party, such as a 1980s or 1990s retro night, where guests can dress up and enjoy music from those decades. Alternatively, plan a weekend getaway with close friends to a beach resort or mountain cabin for relaxation and adventure. Another great idea is to organize a dinner party at a favorite restaurant or at home, complete with a custom cake. For those who enjoy experiences, consider activities like a wine tasting, cooking class, or even an escape room challenge to create lasting memories.