- International dayWorld Autism Awareness Day
- International dayInternational Day for Mine Awareness and Assistance in Mine Action
- International dayInternational Day of Conscience
- International dayInternational Day of Sport for Development and Peace
- International dayInternational Day of Reflection on the 1994 Genocide against the Tutsi in Rwanda
- International dayWorld Health Day
- International dayInternational Day of Human Space Flight
- U.S. observanceGood Friday
- International dayWorld Chagas Disease Day
- State holidayState Holiday
- International dayInternational Wellness Day
- U.S. observanceEaster Sunday
- State holidayEmancipation Day
- State holidayEmancipation Day (observed)
- State holidayPatriots' Day
- International dayChinese Language Day
- International dayWorld Creativity and Innovation Day
- State holidaySan Jacinto Day
- International dayInternational Day of Greening the Planet
- International dayInternational Mother Earth Day
- International dayEnglish Language Day
- International daySpanish Language Day
- International dayWorld Book and Copyright Day
- International dayInternational Day of Multilateralism and Diplomacy for Peace
- State holidayConfederate Memorial Day
- International weekWorld Immunization Week
- International dayInternational Delegate’s Day
- International dayWorld Malaria Day
- International weekWorld Immunization Week
- International dayInternational Chernobyl Disaster Remembrance Day
- International dayWorld Intellectual Property Day
- International weekWorld Immunization Week
- International dayInternational Girls in ICT Day
- International weekWorld Immunization Week
- International dayWorld Day for Safety and Health at Work
- State holidayArbor Day
- International weekWorld Immunization Week
- International dayInternational Day in Memory of the Victims of Earthquakes
- International weekWorld Immunization Week
- International dayInternational Jazz Day
- International weekWorld Immunization Week
Calendar sources: OPM, US holiday calendar, United Nations. Regional and observed dates are labelled on each entry.