Baha’is will commemorate the Day of the Covenant on Nov. 26, and the Ascension of Abdu’l-Baha on Nov. 28. The Day of the Covenant commemorates Baha’u’llah’s appointment of His eldest son, Abdu’l-Baha, as the protector of the Covenant of Baha’u’llah, which was established to ensure the unity of the Baha'i Faith. The Ascension of Abdu’l-Baha marks the anniversary of his death in 1921.
As protector of the Covenant, Abdu’l-Baha, (sometimes referred as the Center of the Covenant), was charged with safeguarding and protecting the Faith against differences and schisms, making it impossible for anyone to create a new sect or faction of belief.
The Covenant of Baha’u’llah is unique in religious history: No other world religion’s sacred scriptures provide such explicit instructions for the organization of the community of believers after the founder’s passing. The Baha'i Faith is thus the first religion in history that has survived its critical first century with its unity firmly established —and ultimately with a blueprint for a divinely ordered global civilization to bring unity to the world.
After the death of Baha’u’llah in 1892, Abdu’l-Baha carried forth his father’s mission until he died in 1921 at age 77. Abdu’l-Baha was known as an ambassador of peace, a champion of justice and the leading exponent of the new religion.
During visits to Europe in 1911 and more than 40 cities in the United States and Canada in 1912, he was greeted with respect and acclaim by believers and non-believers. In city after city, he was invited to speak at churches and synagogues, and before distinguished groups and organizations. The net effect was to establish the Baha'i Faith as a major new force for social reform and religious renewal.
Affirming that "Love is the most great law" and that the "supreme need of humanity is cooperation and reciprocity" among all its peoples, Abdu'l-Baha reached out to leaders and the public – indeed, to every soul who crossed his path.
Abdu’l-Baha’s funeral on Mt. Carmel was attended by 10,000 mourners from all persuasions and denominations. He is buried in a vault on the north side of the Shrine of the Bab