September 11 Holidays, events and History 2021 September 11 Holidays, events and History 2021. DateDayHoliday NameHoliday TypeCountry11 SepSaturdayPohnpei Liberation DayLocal holidayMicronesia11 SepSaturdayDay of CataloniaAutonomous Community HolidaySpain Previous Article September 10 Holidays, events and History 2021 Next Article September 14 Holidays, events and History 2021 No Comments Yet Leave a Reply Cancel replyYour email address will not be published.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.