September 18 Holidays, events and History 2021 September 18 Holidays, events and History 2021. DateDayHoliday NameHoliday TypeCountry18 SepSaturdayNational DayNational holidayChile Previous Article September 17 Holidays, events and History 2021 Next Article September 19 Holidays, events and History 2021 No Comments Yet Leave a Reply Cancel replyYour email address will not be published.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.