Shops such as the popular Kwok Kam Kee bakery saw long queues of festivalgoers eager to sample the island's favourite sweet buns.
Filled with sesame, lotus seed or bean paste, the plump buns are stamped with the Chinese character for "peace and safety" in crimson.
At the stroke of midnight, 12 climbers who have advanced through qualifying contests in previous weeks will speed-climb up the bun tower for a grab at glory.