In 'The Bahá'í World', Vol. XV, p. 691 we read: “Bahá'u'lláh
designated those days as the 'Ayyam-i-Ha and ordained that they should
immediately precede the month of 'Ala, which is the month of fasting. He
enjoined upon His followers to devote these days to feasting, rejoicing, and
charity.”
(From a letter written on behalf of the Universal House of Justice to
an individual believer, January 18, 1982; compilation: Lights of Guidance)
