It's Mr. Tortoise's birthday and time for cake. But how many candles does the cake need? Mr. Tortoise doesn't remember how old he is so he and the partygoers try various ways to figure his age before they have the cake.

After celebrating their first nine same-day birthdays together, Amanda and Leo, having fallen out on their tenth and not speaking to each other for the last year, prepare to celebrate their eleventh birthday separately but peculiar things begin to happen as the day of their birthday begins to repeat itself over and over again.

Charlie and Mouse are getting ready for Mom's birthday and things are not going exactly as planned... but with plenty of humor and imagination, they'll prove that sometimes when things are not perfect, what they turn out to be is even better.

With her eighth birthday coming up, Marya claims she is having an epic henna party, so now she must convince her family to make it happen and work to pull it off, but everything Marya does seems to end in disaster.

Henry and his big dog Mudge celebrate Henry's birthday with a pinata, a lively birthday party, and a cake shaped like a fish tank, making May first the best day ever.

As spring arrives on Gardam Street, there are surprises in store for each Penderwick, from neighbor Nick Geiger's expected return from the war to Batty's new dog-walking business, but her plans to use her profits to surprise her family on her eleventh birthday go astray.

After her twelfth birthday, Rory checks off a list of things she is finally allowed to do, but unexpected consequences interfere with her involvement in the movie being shot at her school, while a weird prediction starts to make sense.

Fox and Rabbit are cooking up something very special for Sparrow's birthday! Sparrow loves food, so Fox and Rabbit team up with Owl to create the world's biggest pizza. But since they don't have the world's biggest oven, they don't know how to cook it. Fox and Rabbit decide to ask for help from Dragon. They've never met Dragon (who hopefully likes to eat pizza, not foxes or rabbits...), so they find their courage together. Dragon wants to help but...

After winning a blue ribbon in her first show as a Canterwood Crest Academy student, Lauren and her friends begin planning a masquerade party to celebrate Halloween and Lauren's thirteenth birthday.