Following are some of the verified dates of demise of the well known Islamic saints in Gregorian calendar. Since most of the recorded dates are in Hijri calendar, there is no standard way to translate it in Gregorian calendar without an error of 1 to 2 days. However in some cases, the day is also recorded, which helps in removing this small error.
This list will be updated continuously.
26: Demise of Khwāja Muhammad Usmān Dāmāni of Musa Zai Sharif, khalifa of Khwāja Dost Muhammad Qandhāri, died 26 January 1897 (Tuesday, 22 Shaban 1314 AH ).
12: Demise of Sayyid Laʻal Shah Hamdāni Bilāwali, chief khalifa of Khwāja Muhammad Usmān Dāmāni of Musa Zai Sharif, died 12 February 1896 (Wednesday 27 Shaʻbān 1313 AH )
12: Demise of Shaykh Sirajuddin Naqshbandi Mujaddidi of Musa Zai Sharif, 12 February 1915 (Friday 26 Rabī al-Awwal 1333 AH).
28 Mar: Khwāja Muhammad Sādiq Fārūqī Sirhindī, the eldest son of Imām-i Rabbānī Shaykh Ahmad Sirhindī, died 28 March 1616 (Monday 9 Rabi al-Awwal 1025 AH)
1: Demise of Mullā Muhammad Rasool Laūn Khurāsāni, khalifa of Khwāja Muhammad Usmān Dāmāni of Musa Zai Sharif, died 1 June 1897 (Tuesday 29 Dhul-Hijja 1314 AH )
8: The demise of the Holy Prophet, 8 June 632 (Monday 12 Rabi al-Awwal 11 AH).
8: Demise of Sayyid Mīr Ahmad Ali Dahlawi, khalifa of Khwāja Muhammad Usmān Dāmāni of Musa Zai Sharif, died 8 July 1883 (Sunday 2 Ramadan 1300 AH )
28: Demise of Khwaja Pir Fazal Ali Qureshi Naqshbandi Mujaddidi, khalifa of Shaykh Sirajuddin of Musa Zai Sharif, died 28 November 1935 (Thursday 1 Ramadan 1354 AH).
12: Demise of Shaykh Abdul Ghaffar Fazali Naqshbandi, alias Pir Mittha, 12 December 1964 (8 Shaban 1384 AH).
12: Demise of Shaykh Allah Bakhsh Abbasi Naqshbandi Ghaffari, alias Sohna Saeen, 12 December 1983 (6 Rabi al-Awwal 1404 AH)
 Majmūa Fawāid-i Usmāniyah, by Sayyid Akbar Ali Dahlawi, translated in Urdu by Muhammad Nazīr Rānjhā.