- Badí' (Bahá'í) Calendar: An Introduction, The, by Moojan Momen. (2014-11) Summary of the nature of Bahá'í calendar, the way the Badí' calendar works, and the reason for the 2014 revisions inaugurated by the Universal House of Justice.
- Lifetime with 'Abdu'l-Bahá, A: Reminiscences of Khalíl Shahídí, Ahang Rabbani, ed. and trans. (2008) Extensive recollections of four decades with the Holy Family in the time of Abdu'l-Bahá and Shoghi Effendi. Includes appendices on the next Manifestation, Bahá'í holy days, avoidance of tobacco, penmanship, and observations on daily life of the time.
- Regarding the Implementation of the Badi` Calendar, by Universal House of Justice. (2014-07-10) Message to the Bahá’ís of the world on the updated calendar of Bahá'í holy days. Includes a table of Bahá’í Dates 172 to 221 B.E., and a letter to an individual explaining the date of the astronomical new moon in Islamic and Bahá'í calendars.
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