Best seen: moonrise on Saturday, November 16 The penultimate full moon of 2024, the “Beaver Moon”—also known as the “Frost Moon” and the “Mourning Moon” is a supermoon and 2024’s last. Although a supermoon, it will be the third-smallest of 2024’s four “supermoons.” The Beaver moon's name originates as it is the time when beavers build their winter dams.