International Port Wine Day is observed worldwide every January 27, celebrating the unique style of Portuguese fortified wine known as port, which is exclusively produced in the Douro Valley. Established in 2017 by the Center of Wine Origins, this holiday 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 bottles to share with friends, or planning vineyard tours in northern Portugal. The celebration highlights the various styles of port, including ruby, tawny, and white ports, and encourages enthusiasts to enjoy port wine at room temperature, typically paired with desserts or cheeses. Additionally, some wine lovers recognize an alternative International Port Wine Day on September 10.