Yes, May Day is in May, and although this image may look like children are dancing around a May pole, these youngsters are actually swinging around an old piece of playground equipment called, The Giant Stride. This apparatus can still be found today, but many communities have banned it for being too dangerous.
If you're interested, I have information, images, and videos over on the Heroes, Heroines and History blog where you're welcome to share your thoughts and memories.
www.hhhistory.com/
http://www.hhhistory.com/2017/09/fun-filled-danger-of-giant-stride.html