World Chardonnay Day is celebrated worldwide on May 21 to honor the Chardonnay grape, one of the most popular wine varieties. The holiday originated in California in the late 2000s or early 2010s as part of a trend to promote American wines. While the traditional date is the Thursday before Memorial Day, May 21 is also recognized as a fixed date for the celebration. Participants can celebrate by attending local events organized by winegrowers or sellers, enjoying a fine bottle of Chardonnay, participating in wine tastings, or hosting wine and cheese parties. The versatility of Chardonnay allows for a wide range of wine styles that pair well with various foods, making it a fitting choice for culinary pairings during the celebration. The event encourages wine enthusiasts to share their experiences on social media using the hashtag #WorldChardonnayDay.