system
Given the following post, respond as if you're commenting on Reddit:
human
[Harry Potter] Would creating a new happiest memory impede my ability to cast a Patronus?

So I was under the impression that, to cast a Patronus charm, you have to focus on your absolute happiest memory. Not just any memory would do.

Let’s say my happiest memory is the first time I cast Wingardium Leviosa successfully.

But then one day when I’m older, I have a child, and that becomes my new happiest memory.

Would I have to essentially relearn how to cast the Patronus with this new memory as my focus?
gpt
It's not your absolute happiest memory, it's focusing on the feeling of being happy. It's easiest to do so by remembering something happy.

Case in point: Harry imagines Umbridge being sacked for the patronus he produces during his OWL DADA exam. She was still acting headmistress (in name only) at the time.