This photograph was taken in rural United States as WWII was going on in Europe - - maybe 65 years ago. Note the advertising support for the performance on stage as well as the fact that some of the kids don't have shoes at all based on the color of their feet.
Here is a similar scene from a few years ago:
Part of a set from a Library of Congress collection of public domain photographs taken in color in the early 1940's with cameras using larger formats than 35mm. Titles can be searched on the LOC site or by going to Flikr and searching under the title "Library of Congress." Photographs have been cropped slightly and the color and contrast adjusted to be more favorably displayed.