sentences:  The symbolic notion of the renewal of time in each religious dispensation was made explicit by the writings of the Báb and Baháʼu'lláh and the calendar and the new year made this spiritual metaphor more concrete.ʻAbdu'l-Bahá, Baháʼu'lláh's son and successor, explained that significance of Naw-Rúz in terms of spring and the new life it brings.He explained that the equinox is a symbol of the Manifestations of God, who include Jesus, Muhammad, the Báb and Baháʼu'lláh among others, and the message that they proclaim is like a spiritual springtime, and that Naw-Rúz is used to commemorate it.