The image is a poster for a festival called "Buen Humor" in Spanish. The poster has a black background with white text that reads "Semanario Satírico 40 Centimos" which translates to "Happy 40th Birthday" in English.

In the center of the poster, there is an illustration of a blue dragon with red and white wings. The dragon is holding a yellow sun in its right hand and appears to be dancing. It has a fierce expression on its face and its wings are spread out behind it. The illustration is done in a cartoon-like style with exaggerated features and bright colors.