Original: In Germany, Walpurgisnacht, the night from 30 April to 1 May, is the night when witches are reputed to hold a large celebration on the Brocken and await the arrival of spring.
Simplified: In Germany, Walpurgisnacht, the night from April 30 to May 1, is the night when allegedly the witches hold a large celebration on the Blocksberg and await the arrival of Spring.