Rosemary reminds her brother first thing: you have to be nice to someone on their birthday. But then everyone else forgets. Her parents don't even say “Happy Birthday,” her teacher sends her to the principal's office, and the awful out-of-town cousins take over the house. But then, the next morning, Rosemary learns something new about how calendars work and she gets to have her birthday all over again. Rosemary is a pip, and the story of her dreadful day captures how humorous kids' heightened disappointments can be.