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
Berber languages European languages distinguish between the words "Berber" and "barbarian", while Arabic has the same word "al-Barbari" for both meanings. Some other Berber writers, especially in Morocco, prefer to refer to Berber with "Amazigh" when writing about it in French or English. Traditionally, the term "Tamazight" (in various forms: "Thamazighth", "Tamasheq", "Tamajaq", "Tamahaq") was used by many Berber groups to refer to the language they spoke, including the Middle Atlas, the Riffians, the Sened in Tunisia and the Tuareg. However, other terms were used by other groups; for instance, some Berber populations of Algeria called their language "Taznatit" (Zenati) or "Shelha",