1
Kannazuki /sinto japon

4
St Francis Day - Catholic Christian
Blessing of the Animals - Christian
7-14
Navaratri ** - Hindu
11
Thanksgiving (Canada: October 11; USA: November 25)
15
Dasara ** - Hindu
18
Luke, Apostle & Evangelist - Christian
Mawlid an Nabi * the birthday of the Islamic prophet Muhammad[
20
Birth of the B'ab * - Baha'i
Installation of Scriptures as Guru Granth - Sikh
Feast of the Holy Book of Sikhs
Lakshmi Puja - Hindu

24
Kathina Festival , Theravada feast marking the end of the monastic retreat by the donation to the monks of a so-called Kathina robe.

27
Lhabab Düchen , Celebration of the day that saw the Buddha return from the world of the gods where he had taught. Fourth “big moment” of the vajrayana calendar.

28
Milvian Bridge Day - Christian
31
All Hallows Eve - Christian
Reformation Day - Protestant Christian
31-1nov
Samhain - * Wicca/Neo Pagan , festival of Gaelic pagan origin, celebrated between October 31 and November 1, often also known as Celtic New Year

Rama Ekadashi - Hindu

http://www.interfaith-calendar.org/2021.htm
https://www.drikpanchang.com/calendars/vedic-calendars.html
https://www.calendrier-des-religions.ch/fetes.php?t=2

https://days.pravoslavie.ru/