The First Day of Winter by Denise Fleming is a cumulative children's book where a best friend gives gifts over ten days to build the perfect snowman, starting with a red cap on day one and adding items like mittens, scarves, pine cones, and peanuts, all while using Fleming's signature colorful pulp-painting illustrations. The story follows a familiar, chant-along rhythm, making it a popular read-aloud for teaching counting and winter themes.