December 4

With regard to English usage, Shoghi Effendi endorsed the capitalization of all pronouns referring to the Báb, Bahá'u'lláh, and 'Abdu'l-Bahá, as a mark of respect for the Stations of the Central Figures of the Faith. 
(From a Memorandum of the Research department of the Universal House of Justice dated 23 May 1991, attached to a letter dated 20 June, 1991, written on behalf of the Universal House of Justice to an individual believer)