December 1, 2027
- International dayWorld AIDS Day
EVENTS & OBSERVANCES · UNITED STATES & INTERNATIONAL
1960–2030Explore the archive
December 2027 observances.
Holidays, cultural dates and regional observances — with international days, too. Explore each date and its sources.
December 2, 2027
- International dayInternational Day for the Abolition of Slavery
December 3, 2027
- International dayInternational Day of Persons with Disabilities
December 4, 2027
- International dayInternational Day Against Unilateral Coercive Measures
- International dayInternational Day of Banks
December 5, 2027
- International dayInternational Volunteer Day for Economic and Social Development
- International dayWorld Soil Day
December 7, 2027
- International dayInternational Civil Aviation Day
December 9, 2027
- International dayInternational Anti-Corruption Day
- International dayInternational Day of Commemoration and Dignity of the Victims of the Crime of Genocide and of the Prevention of this Crime
December 10, 2027
- International dayHuman Rights Day
December 11, 2027
- International dayInternational Mountain Day
December 12, 2027
- International dayInternational Day of Neutrality
- International dayInternational Universal Health Coverage Day
December 14, 2027
- International dayInternational Day against Colonialism in All its Forms and Manifestations
December 15, 2027
- International dayWorld Turkic Language Family Day
December 18, 2027
- International dayArabic Language Day
- International dayInternational Migrants Day
December 19, 2027
- International dayInternational Day of Recognition for Women Searchers of Missing Persons
December 20, 2027
- International dayInternational Human Solidarity Day
December 21, 2027
- International dayWorld Basketball Day
- International dayWorld Meditation Day
December 23, 2027
- State holidayChristmas Eve (observed)
- State holidayWashington's Birthday
December 24, 2027
- U.S. federal holidayChristmas Day (observed)
- U.S. observanceChristmas Eve
- International dayInternational Anti-Cybercrime Day
December 25, 2027
- U.S. federal holidayChristmas Day
December 26, 2027
- State holidayDay After Christmas
December 27, 2027
- International dayInternational Day of Epidemic Preparedness
- State holidayDay After Christmas (observed)
December 31, 2027
- U.S. federal holidayNew Year's Day (observed)
- U.S. observanceNew Year's Eve
Calendar sources: OPM, US holiday calendar, United Nations. Regional and observed dates are labelled on each entry.