page_title: Twin Holy Birthdays
section_title: Significance
hierarchical_section_title: Twin Holy Birthdays / Significance
caption_attribution_description: English: This chart shows the fluctuations of the eighth new moon after Naw-Rúz (Bahá'í New Year) 172 to 221 B.E. (2015 - 2065 C.E.), marking the date for the Twin Holy Birthdays, referring to two successive holy days in the Bahá'í calendar and effective from 2015 C.E. onwards. The dates for this chart have been taken from the following table: Bahá'í Dates 172 to 221 B.E. (2015 - 2065; prepared by the Baha'i World Centre).
context_page_description: The Festivals of the Twin Birthdays or the Twin Holy Birthdays refers to two successive holy days in the Baháʼí calendar that celebrate the births of two central figures of the Baháʼí Faith. The two holy days are the birth of the Báb on the first day of Muharram in the Islamic calendar and the birth of Baháʼu'lláh on the second day of Muharram.
  They are observed on the first and the second day following the occurrence of the eighth new moon after Naw-Rúz, as determined in advance by astronomical tables using Tehran as the point of reference. This results in the observance of the Twin Birthdays moving, year to year, within the months of Mashíyyat, ʻIlm, and Qudrat of the Baháʼí calendar, or from mid-October to mid-November in the Gregorian calendar.
  Prior to 2015 and a decision by the Universal House of Justice, these two holy days had been observed on the first and second days of Muharram in the Islamic lunar calendar in the Middle East, while other countries observed them according to the Gregorian calendar on 20 October and 12 November.
context_section_description: The notion of "twin Manifestations of God" is a concept fundamental to Baháʼí belief, describing the relationship between the Báb and Baháʼu'lláh. Both are considered Manifestations of God in their own right, having each founded separate religions (Bábism and the Baháʼí Faith) and revealed their own holy scriptures. To Baháʼís, however, the missions of the Báb and Baháʼu'lláh are inextricably linked: The Báb's mission was to prepare the way for the coming of Him whom God shall make manifest, who eventually appeared in the person of Baháʼu'lláh. For this reason, both the Báb and Baháʼu'lláh are revered as central figures of the Baháʼí Faith. A parallel is made between Baháʼu'lláh and the Báb as between Jesus and John the Baptist.
  In the Kitáb-i-Aqdas, Baháʼu'lláh wrote that his birthday and that of Báb "are accounted as one in the sight of God".
caption: Chart showing the fluctuations of the eighth new moon after Naw-Rúz (Baháʼí new year) marking the date of the Twin Holy Birthdays in the Baháʼí calendar, between 172 and 221 B.E. (2015–2065).[9]
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