Play creates memories precisely because nobody was trying to create memories.

The moments you actually remember tend to be the ones nobody staged. The delayed train, the meal that went wrong, the evening that turned strange. Trying to manufacture a memorable occasion introduces a kind of self-consciousness that keeps everyone slightly outside the experience, watching whether it is working.

Rather than planning the significant event, plan for unstructured time with people you like and let it go where it goes. Put the phone down and stop documenting. What makes something memorable is usually that you were fully inside it, which is the one thing you cannot arrange in advance.