October 31 Holidays, events and History 2021 October 31 Holidays, events and History 2021. DateDayHoliday NameHoliday TypeCountry31 OctSundayReformation DayNational holidayChile31 OctSundayReformation DayNational holidaySlovenia Previous Article October 29 Holidays, events and History 2021 Next Article November 1 Holidays, events and History 2021 No Comments Yet Leave a Reply Cancel replyYour email address will not be published. Save my name, email, and website in this browser for the next time I comment.