First off, I started reading this without knowing that the birthday in question - June 5th - is actually my own birthday, and that may have predisposed me a little bit towards liking this book, but I didn't really need any extra incentive: It was a thoroughly charming, light read that I'd recommend for most 9-12 year olds. Point A) There's nothing gender-y about this book: Although I personally don't think there's such a thing as 'boy books' and 'girl books' you do sometimes come up against kids who are dead set against reading anything they identify as belonging to the other team. It's a fight I'm not going to stop fighting, but in the case of this book, there's no need to fight it - having both male and female main characters, both of whom are fleshed out pretty well (even if we get more of the female MC POV) is a strong selling point. Point B) The Groundhog Day on your birthday is a plot that every kid will be able to appreciate: there's nobody who doesn't fantasize about having their day, over and over again. Or reliving a bad day that was supposed to be good until it comes out the right way. Point C) It's funny. Not hilarious, but witty little moments here and there that show that Wendy Mass gets how kids think and how friendships really work, that there's jealousy and joy all mixed in and muddled together.Point D) It's the first in a trilogy, which is always a selling point for me. I love to revisit good characters, see how they're doing.