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
Fasting during Ramadan days away from home. If the circumstance preventing fasting is temporary, a person is required to make up for the missed days after the month of Ramadan is over and before the next Ramadan arrives. Should the circumstance be permanent or present for an extended amount of time, one may recompense by feeding a needy person for every day missed. If one does not fit into any category of exemption and breaks the fast out of forgetfulness, the fast is still valid. Intentionally breaking the fast voids it, and the person must make up for the entire day later. If