A guess, not an answer. You'll see what everyone else said.
Machine-generated description — written by an image model, not by a person.
Vibrant street parade featuring traditional folk dancers in colorful, embroidered costumes—men in vests, hats, and knee-high boots, women in layered skirts and blouses—dancing in unison. Urban setting with Soviet-era concrete buildings in background. Likely 1960s–1980s Eastern Europe.