"Big day ahead!" Big Mama says as she wakes young Tansy. She hurries Tansy through breakfast and a bath, and dresses in her best clothes. Big Mama even wears her special brooch. What could be so special about this day? Soon enough, Tansy learns the importance: Big Mama is voting for the first time!

The elation and pride of Big Mama is captured in brilliant storytelling and gorgeous watercolors, bringing this historical moment alive. The Big Day celebrates Agnes Sadler, the first Black woman to cast a vote in Knoxville, Tennessee, on September 6, 1919.