"Celebrating her forty-fifth birthday at her local pub, popular podcaster Alix Summers crosses paths with an unassuming woman called Josie Fair. Josie, it turns out, is also celebrating her forty-fifth birthday. They are, in fact, birthday twins. A few days later, Alix and Josie bump into each other again, this time outside Alix's children's school. Josie has been listening to Alix's podcasts and thinks she might be an interesting subject for her...

It is Shyanna's long-awaited, all-important thirteenth birthday, but nothing is going right--and when Cora's baby sister Jewel gets trapped in a fishing net, Shyanna is the only one small enough to get inside the net and rescue her at the risk of being turned into a human forever.

Sister Bear is distressed that things don't go quite right at her birthday.

Amanda and Leo, best friends with the same birthday, had a falling out on their tenth birthday and have not spoken since, but peculiar things begin to happen as the day of their eleventh birthday repeats itself again and again.

"Klondike isn't supposed to eat the cupcakes until his sister's birthday party...but can he wait that long?"--

Elmer the patchwork elephant and his cousin Wilbur investigate a distant noise and see their friend Super El rescue Old, a pink elephant whose 100th birthday celebration caused an earthquake.

It is Mom's birthday, and Charlie and Mouse and their Dad want everything to be perfect--so when the cake gets burnt the boys have to come up with a new plan, pronto.

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.

When a bored Princess Patricia Priscilla makes her chambermaid switch identities with her so she can attend the village school, her attitude changes and she plans a new way to celebrate her sixteenth birthday.

With the arrival of August, Zinnia, the youngest of the Huit octuplets, eagerly anticipates getting her power and gift, both of which hold big surprises that are revealed to the sisters on their eighth birthday.