I will change into said pair of pants when I got out to dinner tonight for my sister's birthday. She will be there, too, of course. I don't go out to eat for birthdays just at random. Although that would be kind of a funny thing to do. Hey, it was your birthday yesterday! I went to Macaroni Grill in celebration! What did you do? Actually, I probably wouldn't go to Macaroni Grill. But that's beside the point.
The real question is, while I am out to dinner, what is the rest of my family going to eat? Pasta? Pizza? Hmm. I will sit here in my pajamas while I figure this out. The End.