Chapter 42 uses different calendar systems to mark the day of Baba's passing. Can you elaborate on these different references?

Indeed, Chapter 42 provides a multifaceted description of the date of Sai Baba's Mahasamadhi by referencing multiple calendar systems. From the Hindu lunar calendar, it specifies the Shaka year 1840, the day of Vijayadashami during the bright half of the month (Shukla Paksha). It also notes the solar position as the first month of Dakshinayan. Concurrently, it references the Islamic calendar, stating it was the 9th date of the Muslim month, corresponding to the night of 'Kattal,' the eve of Moharram. The chapter also delves into the specific lunar day (tithi), explaining that while the Dashami period ended at 12:30, the departure occurred as the Ekadashi tithi began.