October 31
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October 31 is the 304th day of the year (305th in leap years) in the Gregorian calendar; 61 days remain until the end of the year.
- 680 CE – Arrival of the captives of Karbala in Syria (Safar 1, 61 AH)
- 925 CE – Demise of Muhammad b. Zakariyya al-Razi, (Sha'ban 5, 313 AH).
- 1929 CE – Birth of Sayyid Jawad Al 'Ali Shahrudi, a Shi'a scholar and the author of Insan dar marahil-i shish gana. (Jumada I 27, 1348 AH)
- 1972 CE – Completion of Tafsir al-mizan by Allama Tabataba'i after 20 years of its start (Ramadan 23, 1392 AH).