June 21

International Yoga Day was proclaimed by the UN General Assembly in 2014 following a proposal by India. It is celebrated each year on June 21, chosen for its significance as the summer solstice. Millions participate in yoga sessions, demonstrations, and mass gatherings across the globe. Governments, schools, and yoga institutions organize free classes and workshops. The day aims to raise awareness about yoga's holistic health benefits and its role in promoting sustainable lifestyles. Virtual events and social media campaigns further extend its reach, inviting diverse communities to practice and learn.

World Humanist Day is held each year on June 21 to promote the philosophy of humanism. It was first proposed in 1989 by the Humanists International organization. The day unites secular humanists to advance ideals of rational inquiry, ethical living, and human rights. Local groups host lectures, community service projects, and social gatherings. Themes often focus on education, science, and social justice initiatives. By highlighting humanist principles, the observance encourages dialogue on how to improve the human condition.

World Hydrography Day is celebrated annually on June 21 by the International Hydrographic Organization. It raises awareness of the critical role hydrography plays in maritime safety, commerce, and environmental protection. Each year's theme focuses on a different aspect of marine data collection and charting. Events include conferences, workshops, and chart exhibitions led by hydrographic offices worldwide. The day underscores advancements in mapping technologies such as sonar, satellite imagery, and autonomous vehicles. By promoting hydrography, stakeholders aim to ensure safe navigation and sustainable use of marine resources.

International Surfing Day was launched in 2005 by the Surfrider Foundation and its grassroots chapters worldwide. Celebrated on the summer solstice, it unites surfers and ocean lovers through beach cleanups, surf contests, and educational workshops. Participants raise awareness about marine pollution and coastal preservation efforts. Many regions organize charity fundraisers supporting marine research and habitat restoration. The day underscores the bond between surfing and environmental stewardship, inspiring active community engagement.