Blessed Walpurgisnacht for all those who celebrate it.
A Germanic variation of the May Day celebration held on April 30 - May 1. Before Christianity, bonfires were lit on this day to welcome the coming of Summer. As we are midway between the Summer Solstice and the Spring Equinox.
After the introduction of Christianity, the holiday became a celebration of the German St Walpurgis and their accomplishments of curing disease and combating witchcraft.
Walpurgisnacht: The German Night of the Witches explained