Walpurgisnacht (in German folklore), is the night from 30 April to 1 May when witches are reputed to hold a large celebration on the Brocken mountain to await the arrival of spring and hold revels with their gods. Brocken is the highest of the Harz Mountains of north central Germany. It is noted for the phenomenon of the Brocken spectre and for witches’ revels which reputedly took place there on Walpurgis night. The Brocken Spectre is a magnified shadow of an observer, typically surrounded by rainbow-like bands, thrown onto a bank of cloud in high mountain areas when the sun is low. – Oxford Phrase & Fable.
WILLIE NELSON and JANE CAMPION