What is eleven birthdays?

Eleven Birthdays is a children's novel written by Wendy Mass. It tells the story of two best friends, Amanda and Leo, who were born on the same day and have celebrated every birthday together since they were born. However, on their eleventh birthday, a big fight breaks out between them, causing them to split up and celebrate their birthdays separately.

As they continue to celebrate their birthdays separately every year, strange things start happening to them. They keep reliving their eleventh birthday over and over again, and they soon realize that they are stuck in a never-ending birthday loop.

Amanda and Leo must work together to break the loop and fix their friendship. The novel explores themes of friendship, forgiveness, and personal growth.

Eleven Birthdays has been critically acclaimed for its clever plot and relatable characters. It has also won several awards, including the New York State Charlotte Award for children's literature.