The Ascension of 'Abdu'l-Bahá is a Bahá'í holy day commemorating the passing of 'Abdu'l-Bahá, the eldest son and appointed successor of Bahá'u'lláh, who led the Bahá'í Faith from 1892 until his death in 1921 . Observed annually on November 28 (in 2026), the commemoration is held at approximately 1 a.m., the approximate time of his death in Haifa . Bahá'ís mark the occasion with prayers and reflection on his life of service, his role as the authorized interpreter of Bahá'u'lláh's writings, and his leadership of the community during a formative period of its development .