ALA Booklist (Tue Jul 01 00:00:00 CDT 2014)

Inspired by the success of her school's Backwards Day, Judy dares herself to stay in a good mood for an entire week. That's seven days of a tidy room, neatly done hair, homework done early, and absolutely no roaring or stomping. Only her new obsession for finger knitting is keeping her from breaking her good mood challenge. Still, she manages to stay cheerful when her parents refuse to buy her more yarn. But this new Judy is so different and normal ring even at brother Stink and her friends are convinced she has been replaced by an alien. When Judy's knitting threatens to take over her house, she uses a giant ball of yarn to surprise the class in a stunt that reassures her friends that she is the same old Judy. McDonald's peppy writing, with an undercurrent of understanding and sympathy for irrepressible Judy's struggles, and Reynolds' energetic line drawings make for another winning entry in this popular series.

Horn Book

When Judy gets "in a mood" again, she challenges herself be cheerful for a whole week. Whenever things get rough she resorts to finger knitting. By Good Mood Day #7 she has a gigantic ball of yarn and a wonderful surprise for her math class. Always-relatable Judy's efforts to fight off irritation are hilarious; Reynolds captures the high points in his expressive black-and-white illustrations.

School Library Journal (Sun Jun 01 00:00:00 CDT 2014)

Gr 1-3 In the 12th book of the popular series, Judy dares herself to try out a new mood. It's Backwards Day, so she spreads good cheer, smiles at everyone, and is nice to her stinky little brother.