Hirtenkäse, or "herder's cheese", is a distinctive cow's milk cheese made in the allgäu area of southern germany. traditionally, cow herders bring their cows from the alps into allgäu each fall in mid-september. september 18 typically "marks the official start of the almabtrieb, or descent, a day celebrated with a festival ...." hirtenkäse is made from the milk from these cows. it is usually aged eight months.

Source: Wikipedia