and , although they are rarer and often safekept among Yazidis. Yazidis are also said to have two holy books, Book of Revelation and Black Book whose authenticities are debated among scholars. Holy books The Yazidi holy books are claimed to be the Book of Revelation and Black Book. Scholars generally agree that the manuscripts of both books published in 1911 and 1913 were forgeries written by non-Yazidis in response to Western travellers' and scholars' interest in the Yazidi religion; however, the material in them is consistent with authentic Yazidi traditions True texts of those names may have existed, but remain obscure. The real core texts of the religion that exist today are the hymns known as qawls; they have also been orally transmitted during most of their history, but are now being collected with the assent of the community, effectively transforming Yazidism into a scriptural religion. The sacred texts had already been translated into English by the early 20th century. Qewl and Beyt A very important genre of oral literature of the Yazidi community consists of religious hymns, called s, which literally means 'word, speech' (from Arabic ). The performers of these hymns, called the Qewal, constitute a distinct class within the Yazidi society. They are a veritable source of ancient Yazidi lore and are traditionally recruited from the non-religious members of other Kurdish tribes, principally the Dumilî and Hekarî. The qewls are full of cryptic allusions and usually need to be accompanied by čirōks ('stories') that explain their context. Mishur Mishurs are a type of sacred manuscripts that were written down in the 13th century and handed down to each lineage () of the Pirs; each of the manuscripts contain descriptions of the founder of the Pir lineage that they were distributed to, along with a list of Kurdish tribes and other priestly lineages that were affiliated with the founder. The mishurs are safekept among the families of Pirs in particular places that are designated for their safekeeping; these places are referred to as in Kurmanji. According to the Yazidi tradition, there are a total of 40 mishurs which were distributed to the 40 lineages of Pirs. Festivals Yazidi New Year The Yazidi New Year () is called ("Red Wednesday") or ("Wednesday at the beginning of April"). It falls in spring, on the first Wednesday of the April and Nîsan months in the Julian and Seleucid calendars, i.e.