Winnie-the-Pooh and a Busy Day (Russian: Винни-Пух и день забот, romanized: Vinni-Pukh i den zabot , or Winnie the Pooh and a Day of Troubles in the English dub title) is a 1972 animated short film by Soyuzmultfilm, directed by Fyodor Khitruk and Gennady Sokolsky. Based on the book series by A. A. Milne, it is the final part of a trilogy, following Winnie-the-Pooh (1969) and Winnie-the-Pooh Pays a Visit (1971). Twice longer than either of its predecessors, this installment is co-written by Khitruk and Boris Zakhoder, with prototype drawings created by Khitruk and Vladimir Zuikov.

Eeyore and Owl make their first appearance in the trilogy, while Winnie-the-Pooh, Piglet, and the narrator all return. (Rabbit appears only in the second installment.) Once they learn it's Eeyore's birthday, his friends attempt to mark the occasion.