World Vegan Day is an annual event celebrated by vegetarian people around the world on 1 November every year. The benefits of vegetarianism for humans and the natural environment are celebrated through activities such as setting up stalls, hosting potlucks, and planting commemorative trees. The organization was founded in 1994 by Lewis Wallis, chairman of The Vegan Society in the United Kingdom, which celebrated the 50th anniversary of the founding of the organization and the coincidences of "Vegan" and "Veganism". Speaking in 2011, Louise Wallis said "We knew that the society was founded in November 1944 but did not know its exact date, so I decided to go for November 1, partly because I was in charge of Samhan. Loved the idea of a date that matches together. "
World Vegetarian Day has been celebrated in Melbourne since 2003 on the last Sunday of October. The event was started by members of the vegetarian social group Veganus Unite and is now organized by a committee affiliated with Vegetarian Victoria. Stalls include Lentil Anything, Invita Living Foods, Animals Australia, Aduki Independent Press, Eco-Shout Melbourne, Vegan Society of Australia, ALV, Melbourne University Food Co-op, Lush Australia, and Eco Store.
Invercargill Vegan Society in Invercargill, New Zealand has celebrated World Vegan Day since 2011. For World Vegan Day 2012, the world's most southern vegetarian group gave tofu to the butchers, put up posters around their city, served vegetarian muffins in the city center, and held a group potluck dinner. The World Vegetarian Day 2013 celebrations included visiting butcher shops and vegetarian baking in the city center and soy milk giveaways.