National Zinfandel Day is observed worldwide every third Wednesday of November to celebrate the Zinfandel grape, a popular variety grown primarily in California vineyards. This holiday was established in 2012 by Zinfandel Advocates and Producers (ZAP), an organization dedicated to promoting the appreciation and preservation of American Zinfandel. The Zinfandel grape, also known as Primitivo in Italy, has a rich history that includes its introduction to California during the Gold Rush and its decline during Prohibition. Celebrations often include vineyard or winery tours, enjoying a glass of Zinfandel at local wine bars, and sharing bottles with friends. The day encourages enthusiasts to express their love for Zinfandel on social media using the hashtag #NationalZinfandelDay.