WALPURGIS night in northern Sweden may 31, and a traditional bonfire.
On Wikipedia, I read that the first fire were lit in Germany at 9th century in the context of a cult that arose around Saint Walpurgis,, which according to a legend was an English Princess.
The fire was believed to protect against witches and evil.
Light And Darkness
I managed to get the image just as the Sun was about to go down and the shadows deepened. It got to be my illustration about the struggle between light and darkness.