Examples Word Origin (especially in medieval German folklore) the evening preceding the feast day of St. Walpurgis, when witches congregated, especially on the Brocken.
Wal·pur·gis·nacht [vahl- p-gis-nah oo r kht] /vɑlˈpʊər gɪsˌnɑxt/
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for walpurgis night Historical Examples The third incident which we may quote is that of Walpurgis-Night. The very dates upon which this period began and ended—Hallow-E'en and Walpurgis-night—are pregnant with "fairy" associations. British Dictionary definitions for walpurgis night the eve of May 1, believed in German folklore to be the night of a witches' sabbath on the Brocken, in the Harz Mountains Word Origin
C19: translation of German
Walpurgisnacht, the eve of the feast day of St Walpurga, 8th-century abbess in Germany
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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Word Origin and History for walpurgis night Walpurgis night
1822, from German
Walpurgisnacht, witches' revel, especially on Brocken, on May-day eve, literally "the night of (St.) Walpurgis," from Walburga, English abbess who migrated to Heidenheim, Germany, and died there c.780; May 1 being the day of the removal of her bones from Heidenheim to Eichstädt.
Online Etymology Dictionary, © 2010 Douglas Harper