6 June is the National Day of Sweden and has since 2005 been a public holiday. Furthermore, there are official flag flying day observances and a Namesdays in Sweden calendar. In August many Swedes have ''kräftskivor'' (crayfish dinner parties). Martin of Tours Eve is celebrated in Scania in November with ''Mårten Gås'' parties, where roast goose and ''svartsoppa'' ('black soup', made of goose stock, fruit, spices, spirits and goose blood) are served. The Sami, one of Sweden's indigenous minorities, have their holiday on 6 February and Scania celebrate their Scanian Flag day on the third Sunday in July.