Planning a birthday surprise for your girlfriend who lives in a different country can be a thoughtful gesture to show your love and care despite the distance. Start by considering her time zone to ensure your surprise aligns with her day. Arrange for a surprise video call, virtual party, or online gathering with her friends and family, even if they're in different time zones. You can create a digital birthday card with messages and videos from loved ones and share it with her. Consider sending her a virtual gift card to her favorite online store or a delivery of her favorite international cuisine from a local restaurant in her area. Another idea is to schedule an online experience, such as a virtual cooking class, art workshop, or language lesson, that she can enjoy on her special day. Lastly, write her a heartfelt letter or create a digital scrapbook with memories and moments you've shared together. The key is to make her feel loved and celebrated despite the physical distance.