International Port Wine Day is observed worldwide every January 27, celebrating the unique Portuguese fortified wine known as port, produced exclusively in the Douro Valley. Established in 2017 by the Center of Wine Origins, the day aims to protect the heritage of port wine and educate the public about its distinct characteristics compared to other fortified wines. Participants often engage in activities such as attending port wine tastings, purchasing and sharing bottles of port, and learning about its production process, which involves adding distilled grape spirits during fermentation to create a sweet, rich wine. Port wine comes in various styles, including ruby, tawny, and white, and is typically served at room temperature, often paired with desserts or cheeses. Additionally, some wine enthusiasts celebrate an alternative International Port Wine Day on September 10.