October 1, 2027
- International dayInternational Coffee Day
- International dayInternational Day of Older Persons
EVENTS & OBSERVANCES · UNITED STATES & INTERNATIONAL
1960–2030Explore the archive
October 2027 observances.
Holidays, cultural dates and regional observances — with international days, too. Explore each date and its sources.
October 2, 2027
- International dayInternational Day of Non-Violence
October 4, 2027
- International dayWorld Habitat Day
- State holidayFrances Xavier Cabrini Day
- International weekWorld Space Week
October 5, 2027
- International dayWorld Teachers’ Day
- International weekWorld Space Week
October 6, 2027
- International weekWorld Space Week
October 7, 2027
- International dayWorld Cotton Day
- International weekWorld Space Week
October 8, 2027
- International weekWorld Space Week
October 9, 2027
- International dayWorld Migratory Bird Day
- International dayWorld Post Day
- International weekWorld Space Week
October 10, 2027
- International dayWorld Mental Health Day
- International weekWorld Space Week
October 11, 2027
- U.S. federal holidayColumbus Day
- International dayInternational Day of the Girl Child
- State holidayColumbus Day / American Indian Heritage Day / Fraternal Day
- State holidayIndigenous Peoples' Day
- State holidayIndigenous Peoples' Day / Columbus Day
- State holidayNative Americans' Day
October 13, 2027
- International dayInternational Day for Disaster Risk Reduction
October 15, 2027
- International dayInternational Day of Rural Women
October 16, 2027
- International dayWorld Food Day
October 17, 2027
- International dayInternational Day for the Eradication of Poverty
October 18, 2027
- State holidayAlaska Day
October 23, 2027
- International dayInternational Day of the Snow Leopard
October 24, 2027
- International dayUnited Nations Day
- International dayWorld Development Information Day
- International weekDisarmament Week
- International weekGlobal Media and Information Literacy Week
October 25, 2027
- International weekDisarmament Week
- International weekGlobal Media and Information Literacy Week
October 26, 2027
- International weekDisarmament Week
- International weekGlobal Media and Information Literacy Week
October 27, 2027
- International dayWorld Day for Audiovisual Heritage
- International weekDisarmament Week
- International weekGlobal Media and Information Literacy Week
October 28, 2027
- International weekDisarmament Week
- International weekGlobal Media and Information Literacy Week
October 29, 2027
- International dayInternational Day of Care and Support
- State holidayDiwali
- State holidayNevada Day
- International weekDisarmament Week
- International weekGlobal Media and Information Literacy Week
October 30, 2027
- International weekDisarmament Week
- International weekGlobal Media and Information Literacy Week
October 31, 2027
- U.S. observanceHalloween
- International dayWorld Cities Day
- International weekGlobal Media and Information Literacy Week
Calendar sources: OPM, US holiday calendar, United Nations. Regional and observed dates are labelled on each entry.