September 17th, 2023 Constitution Day and Citizenship DaySeptember 18th, 2023 'Constitution Day and Citizenship Day' observedSeptember 19th, 2023 International Talk Like a Pirate DaySeptember 21st, 2023 International Day of PeaceSeptember 22nd, 2023 Emancipation DaySeptember 23rd, 2023 Autumnal equinoxSeptember 24th, 2023 Gold Star Mother's DaySeptember 24th, 2023 World Heart DaySeptember 25th, 2023 Yom KippurSeptember 27th, 2023 World Tourism DaySeptember 27th, 2023 Prophet's BirthdaySeptember 28th, 2023 World Rabies DaySeptember 28th, 2023 World Maritime DaySeptember 30th, 2023 First day of SukkotOctober 1st, 2023 International Day of Older PersonsOctober 2nd, 2023 International Day of Non-ViolenceOctober 2nd, 2023 World Habitat DayOctober 2nd, 2023 Child Health DayOctober 4th, 2023 Feast of St Francis of AssisiOctober 5th, 2023 World Teachers' DayOctober 6th, 2023 Last day of SukkotOctober 7th, 2023 Shmini Atzeret/Simchat TorahOctober 9th, 2023 Native Americans' DayOctober 9th, 2023 Columbus DayOctober 9th, 2023 Indigenous People's DayOctober 9th, 2023 World Post DayOctober 9th, 2023 Leif Erikson DayOctober 10th, 2023 World Mental Health DayOctober 11th, 2023 International Day of the Girl ChildOctober 11th, 2023 World Day for Natural Disaster ReductionOctober 12th, 2023 World Sight DayOctober 15th, 2023 International Day of Rural WomenOctober 15th, 2023 White Cane Safety DayOctober 16th, 2023 World Food DayOctober 16th, 2023 Boss's DayOctober 17th, 2023 World Day for Poverty EradicationOctober 18th, 2023 Alaska DayOctober 24th, 2023 United Nations DayOctober 24th, 2023 World Development Information DayOctober 27th, 2023 World Day for Audiovisual HeritageOctober 27th, 2023 Nevada DayOctober 29th, 2023 World Stroke DayOctober 31st, 2023 HalloweenNovember 1st, 2023 All Saints' DayNovember 1st, 2023 All SaintsNovember 2nd, 2023 All Souls' DayNovember 5th, 2023 Daylight Saving Time endsNovember 6th, 2023 World Day to Protect the Environment in WarNovember 10th, 2023 'Veterans Day' observedNovember 10th, 2023 World Science DayNovember 11th, 2023 Veterans Day