"The Snowy Day" is a children's book written by Ezra Jack Keats. It tells the story of a young boy named Peter who wakes up to find his city covered in snow. Excited, he puts on his red snowsuit and explores the winter wonderland, making snowballs and footprints. Throughout the day, Peter enjoys various activities, such as sliding down a hill and creating a snowman. The story captures the joy and wonder of a snowy day, highlighting the simple pleasures of childhood and the beauty of nature in winter.