8 Apr 1853 Bahá'u'lláh arrives in Baghdád.
1883 - Birth of Elizabeth Hopper, Knight of Bahá’u’lláh named for pioneering to the Madeira Islands
1916 - Tablet of the Divine Plan Revealed
TABLET TO THE BAHÁ'ÍS OF THE UNITED STATES AND CANADA Revealed on April 8, 1916, in the garden outside the Shrine of Bahá'u'lláh, and addressed to the Bahá'ís of the United States and Canada (Abdu'l-Baha, Tablets of the Divine Plan, p. 29)
1922 - On April 8th the Greatest Holy Leaf wrote a general letter to the friends.
She first acknowledges the letters of allegiance they have sent and says Shoghi Effendi is counting upon their co-operation in spreading the Message; the Bahá'í world must from now on be linked through the Spiritual Assemblies and local questions must be referred to them. She then goes on to say: "Since the ascension of our Beloved 'Abdu'l-Bahá, Shoghi Effendi has been moved so deeply ... that he has sought the necessary quiet in which to meditate upon the vast task ahead of him, and it is to accomplish this that he has temporarily left these regions. During his absence he has appointed me as his representative, and while he is occupied in this great endeavour, the family of 'Abdu'l-Bahá is assured that you will all strive to advance triumphantly the Cause of Bahá'u'lláh..." The typewritten letter in English is signed in Persian "Bahá'íyyih" and sealed with her seal.
(Ruhiyyih Khanum, The Guardian of the Baha'i Faith, p. 19)