Zinfandel Day is celebrated annually on November 17, primarily in the United Kingdom, to recognize the Zinfandel grape variety and the wines produced from it. Zinfandel grapes are black-skinned and known for their high sugar content, which allows for the production of wines with an alcohol percentage exceeding 15%. The grape's taste can vary based on ripeness, and it thrives in warm climates. The day encourages wine lovers to indulge in Zinfandel tastings and appreciate the wines crafted from this grape, such as Rombauer and Artezin. The celebration has gained popularity in Europe and includes events like Zinfandel tasting days in cities like San Francisco, promoting the enjoyment and education surrounding this exquisite grape.