When and how did Sai Baba take Samadhi?

The source material describes that Sai Baba attained Nirvana, which signifies his final departure, in the year 1918. As detailed in Chapter 33, he chose the auspicious festival day of Vijayadashami, also known as Dussehra, to make the offering of his own body. This event was then followed by the establishment of his Samadhi, or final resting place, which devotees could visit. The text marks this as a significant transition from Baba being in his bodily form to being in Samadhi.