I would’ve read this picture book in the 80s or maybe early 90s but it could have been from earlier too. It was about a little girl (not sure if she was a human girl or an animal like Frances, etc) who thinks her parents (and sister?) have a party after she goes to bed each night. She finally convinces them to let her stay up and it’s fun and I think they maybe eat toast?
It is not a Frances book, it’s not “I Hate to go to Bed”, and it’s not “Amy’s Long Night”.
Thank you!