- International dayInternational Coffee Day
- International dayInternational Day of Older Persons
- International dayInternational Day of Non-Violence
- International dayWorld Habitat Day
- State holidayFrances Xavier Cabrini Day
- International weekWorld Space Week
- International dayWorld Teachers’ Day
- International weekWorld Space Week
- International weekWorld Space Week
- International dayWorld Cotton Day
- International weekWorld Space Week
- International weekWorld Space Week
- U.S. federal holidayColumbus Day
- International dayWorld Post Day
- State holidayColumbus Day / American Indian Heritage Day / Fraternal Day
- State holidayIndigenous Peoples' Day
- State holidayIndigenous Peoples' Day / Columbus Day
- State holidayNative Americans' Day
- International weekWorld Space Week
- International dayWorld Mental Health Day
- International weekWorld Space Week
- International dayInternational Day of the Girl Child
- International dayInternational Day for Disaster Risk Reduction
- International dayWorld Migratory Bird Day
- International dayInternational Day of Rural Women
- International dayWorld Food Day
- International dayInternational Day for the Eradication of Poverty
- State holidayDiwali
- International dayInternational Day of the Snow Leopard
- International dayUnited Nations Day
- International dayWorld Development Information Day
- International weekDisarmament Week
- International weekGlobal Media and Information Literacy Week
- International weekDisarmament Week
- International weekGlobal Media and Information Literacy Week
- International weekDisarmament Week
- International weekGlobal Media and Information Literacy Week
- International dayWorld Day for Audiovisual Heritage
- State holidayNevada Day
- International weekDisarmament Week
- International weekGlobal Media and Information Literacy Week
- International weekDisarmament Week
- International weekGlobal Media and Information Literacy Week
- International dayInternational Day of Care and Support
- International weekDisarmament Week
- International weekGlobal Media and Information Literacy Week
- International weekDisarmament Week
- International weekGlobal Media and Information Literacy Week
- 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.