Since 1994, the Schiersteiner Weinfest has taken place every year in May. From Thursday to Sunday, wines from the "Schiersteiner Hölle" vineyard are served. In addition to a varied musical program, you can also experience culinary delights.
Text source and further information about this event: https://www.wiesbaden.de/tourismus/weinerlebnis/veranstaltungen-und-weinfeste.php