Can you explain the specific timing and dates mentioned in Chapter 42 regarding Sai Baba's Mahasamadhi?

According to Chapter 42 of the Sai Satcharitra, Sai Baba's body passed away during the day in the Shaka year 1840. The text provides several specific details about the timing, noting it was during the first month of the sun's southern transit (Dakshinayan) on the day of Vijayadashami in the bright half of the month (Shukla Paksha). It also aligns this with the 9th date of the Muslim month, which was the night of 'Kattal' (the eve of Moharram). The chapter further specifies that Sainath made preparations for his departure in the third watch of the day, and while the period of the Dashami tithi was completed at twelve-thirty, the actual time of departure occurred as the Ekadashi tithi dawned.