Berber calendar December - 13 January), and 20 "black nights" (Berber: "iḍan tiberkanin/isṭṭafen", Arabic "al-lyali al-sud"), beginning on the first day of "yennayer", corresponding to the Gregorian 14 January. The first day of the year is celebrated in various ways in the different parts of North Africa. A widespread tradition is a meal with particular foods, which vary from region to region (such as a couscous with seven vegetables). In some regions, it is marked by the sacrifice of an animal (usually a chicken). In Algeria, such a holiday is celebrated even by many people who don't use the Berber calendar in
Matmata Berber region, showing lexical variation, while Penchoen (1968) offers a general discussion of Tunisian Berber and the effects of schooling. Collins (1981) discusses its verbal morphology along with that of other Tunisian Berber varieties. The only general grammatical sketch and vocabulary available is the website put together by Larbi Ben Mamou, a native speaker of the language. "Ethnologue" treats it as part of the Nafusi language spoken in northwestern Libya, although the two belong to different subgroups of Berber according to Kossmann (1999). Matmata Berber Matmata Berber is a Zenati Berber dialect spoken around the town of Matmâta in southern Tunisia,