Answer: The poet is describing "fall" in the poem "wind and the leaves."
Explanation: The poem makes several references that imply that he is talking about autumn, such as: "Put on your dresses of red and gold; For summer is gone, and the days grow cold.", in this line, he refers to the red and gold color the leaves acquire in fall, and he also conveys that, summer is the current season, and winter the following due to cold weather.