This sounds really stupid I know, but I do feel terrible about it.
Today was my kitten Princess Jemima Amaroo Chakra Merrakesh Jezabel's birthday, and she was turning a year old. It wasn't until now that we remember what day it was, and I just feel so bad about it. I'm going to make it up to her tomorrow, and we're going to have a little party with cake (one for the cats, one for the people) and get her some presents, but I just feel so guilty about the whole thing. I really want to make it up to her so she'll forgive me.
That sounds dumb doesn't it? Me feeling guilty about forgetting my cat's birthday, but I can't help but feel awful about it. I need to make tomorrow extra special for her. And in a way, for me too, so I can forget what I've done.