World Martini Day is celebrated worldwide every third Saturday of June, with the next occurrence on June 20, 2026. This holiday honors the martini, an iconic cocktail made primarily of gin and vermouth, which has its origins in the mid-19th century. The celebration was initially known as National Martini Day, originally observed on June 19, but was rescheduled in 2021 to avoid coinciding with Juneteenth in the United States and to align with World Gin Day, which is celebrated the week prior. Typical customs include learning about the history of the martini, enjoying the drink at bars, hosting cocktail parties, and sharing experiences on social media using the hashtag #WorldMartiniDay. The International Bartenders Association recognizes the dry martini as an official cocktail, promoting various styles, including the wet martini, dirty martini, and vodka martini.