International Labour Day (Labor Day in the United States) is an annual holiday to celebrate the achievements of workers. Labour Day has its origins in the labour union movement, specifically the eight-hour day movement, which advocated eight hours for work, eight hours for recreation, and eight hours for rest.

We observe World Tuna Day to highlight the importance of sustainably managed fish stocks in achieving the 2030 Agenda for Sustainable Development.

World Red Cross and Red Crescent Day is an annual celebration of the principles of the International Red Cross and Red Crescent Movement. World Red Cross Red Crescent Day is celebrated on 8 May each year. This date is the anniversary of the birth of Henry Dunant, who was born on 8 May 1828.

International Migratory Bird Day is a conservation initiative that brings awareness on conserving migratory birds and their habitats throughout the Western Hemisphere.

World Bee Day is celebrated on May 20. On this day Anton Janša, the pioneer of beekeeping, was born in 1734. The purpose of the international day is to acknowledge the role of bees and other pollinators for the ecosystem.

World Oceans Day is an annual observation to honor, help protect, and conserve the world’s oceans. The ocean provides us with many resources and services including oxygen, climate regulation, food sources, medicine, and more. World Oceans Day also provides an opportunity to take personal and community action to conserve the ocean and its resources.

The UN  designated 18 June as an international observance, Sustainable Gastronomy Day. The decision acknowledges gastronomy as a cultural expression related to the natural and cultural diversity of the world. It also reaffirms that all cultures and civilizations are contributors and crucial enablers of sustainable development.

International Widows Day is a United Nations ratified day of action to address the "poverty and injustice faced by millions of widows and their dependents in many countries". The day takes place annually on 23 June.