CotD: Rarest of the rare, a leap year cartoon is hard to find. But we do have “Boom Boom” a Looney Tunes short from 1936.
Boom Boom (1936) — Looney Tunes Theatrical Cartoon Series
Porky Pig and Beans, his friend, are in the army together. When a carrier pigeon brings them news that General Hardtack is being held prisoner, Beans motorcycles to the rescue, dragging a reluctant Porky beside him in his sidecar. The two rescue the general and make their escape in a convenient airplane. After they land amidst an explosion, the three bandaged characters share a hospital bed. The general passes along one of his medals to Beans, who gives half to Porky.
Come see “Boom Boom” on video at Big Cartoon DataBase