Can you tell me the specific date and time of Sai Baba's Mahasamadhi according to Chapter 42?

Certainly. Chapter 42 of the Sai Satcharitra provides precise details about Sai Baba's passing. It occurred in the Shaka year 1840, during the sun's southern transit (Dakshinayan), on the day of Vijayadashami. The text specifies that this was the 9th day of the Muslim month, known as the night of 'Kattal,' which is the eve of Moharram. The event took place during the third watch of the day. The chapter also notes a specific detail about the lunar day (tithi), explaining that while the Dashami tithi completed at twelve-thirty, the time of Baba's departure fell within the Ekadashi tithi.