Flies' graveyard and flies' cemetery are nicknames used in various parts of the United Kingdom for sweet pastries filled with currants or raisins, which are jokingly said to resemble dead flies. In Scotland, they are known as fly cakes, fruit slice or fruit squares and in Northern Ireland as currant squares. In the North East of England, the pastries are fly cakes or fly pie. In Wales it is called Cacen Pwdin. The mixture is similar to sweet mince pies, which are traditionally eaten at Christmas time in the United Kingdom.