Nineteen-Day Fast to be the one foretold by the Báb, accepted the fast, but altered many of its details and regulations. The Bahá'í fast resembles fasting practices of several other religions. Lent is a period of fasting for Christians, Yom Kippur and many other holidays for Jews, and the fast of Ramadan is practiced by Muslims. The Bahá'í fasting most resembles the fast of Ramadan, except that the period of fasting is defined as a fixed Bahá'í month, whereas Muslims fast during a lunar month, whose specific Gregorian dates vary from year to year. Bahá'u'lláh established the guidelines of the fast in
Thomas's fruit-eating bat "Artibeus", was elevated to a separate genus. The two genera cannot be differentiated by morphology. The population on the small (3.4 km) island Isla Escudo de Veraguas off the Caribbean coast of Panama was classified as a separate species within the genus ("D. incomitata", the solitary fruit-eating bat) in 1994. It had been evaluated as critically endangered by the IUCN, being threatened by habitat loss in addition to the tiny size of its range, as well as a species in danger of imminent extinction by the Alliance for Zero Extinction. It was transferred to "D. watsoni" in 2009, based on