March 22. On this date in 1966, the Universal House of Justice cabled the NSA of the U.S. "Joyously hail fiftieth anniversary (of the) revelations (of the) first of the Tablets (of the) Divine Plan."

March 22. On this date in 1966, the Universal House of Justice cabled the NSA of the U.S. "Joyously hail fiftieth anniversary (of the) revelations (of the) first of the Tablets (of the) Divine Plan."

Fiftieth Anniversary of the Revelation of the Tablets of the Divine Plan
22 MARCH 1966
To the National Spiritual Assembly of the Bahá'ís of the United States
JOYOUSLY HAIL FIFTIETH ANNIVERSARY REVELATION FIRST OF TABLETS DIVINE
PLAN CHARTER PROPAGATION FAITH THROUGHOUT WORLD.' PRAYING
SHRINES OBSERVANCE OCCASION MAY BE SOURCE RENEWED ENTHUSIASM DEDICATION FRIENDS ACCOMPLISH GOALS WIN FRESH LAURELS SHARE NATIONAL SPIRITUAL ASSEMBLIES CANADA ALASKA HAWAII.
THE UNIVERSAL HOUSE OF JUSTICE
The Tablets of the Divine Plan are fourteen Tablets 'Abdu'l-Bahá revealed in 1916 and 1917 to the Bahá'ís of the United States and Canada. In them He conveys His mandate for the transmission of the Faith of Bahá'u'lláh throughout the world.

On December 23, 1918, 'Abdu'l-Bahá sent his secretary Ahmad Sohrab to the United States to personally deliver the Tablets of the Divine Plan, a collection of 14 letters written between March 1916 and March 1917 by 'Abdu’l-Bahá to Bahá’ís in the United States and Canada. . These collective letters, along with Bahá’u’lláh’s Tablet of Carmel and ‘Abdu’l-Bahá's Will and Testament were described by Shoghi Effendi as "three of the Charters" of the Bahá’í Faith, which along with the Kitáb-i-Aqdas (which Shoghi Effendi described as "the basic laws and ordinances on which the fabric of His future World Order must rest") set the foundation of the Administrative Order. Ahmad Sohrab would later be declared a Covenant-breaker by Shoghi Effendi.