International Grenache Day is observed worldwide every third Friday of September to celebrate Grenache, one of the most widely planted red wine grape varieties. This holiday was established in 2010 by the Grenache Association, an organization dedicated to promoting Grenache, which often receives less attention than other red grape varieties. Grenache, known as Garnacha in Spain, likely originated in the Aragon region and is primarily grown in southern France and Spain, but it can also be found in regions like California, Australia, and South Africa. Celebrations typically involve enjoying a glass of Grenache wine, attending wine tastings, or visiting vineyards that cultivate Grenache. The day encourages wine lovers to share their experiences on social media using the hashtag #GrenacheDay.