June 15

Arbor Day in Costa Rica is celebrated annually on June 15 to highlight the vital role of trees in ecosystems and local communities. Organized by the Ministry of Environment and local municipalities, the day features nationwide tree-planting events in schools, parks, and urban areas. Through workshops and public campaigns, participants learn about reforestation, biodiversity conservation, and climate change mitigation. By planting native species and caring for young trees, volunteers help restore degraded lands and support wildlife habitats. Arbor Day underscores Costa Rica's commitment to sustainability and inspires collective action for a greener future.

Reunion Day in Denmark commemorates the return of Northern Schleswig to Danish rule following the 1920 plebiscite after World War I. Also known as Valdemarsdag or Flag Day, the holiday honors King Valdemar Atterdag's medieval victories. The Danish flag (Dannebrog) is flown nationwide in ceremonies that include official speeches and wreath-laying. Schools and cultural institutions host educational events exploring Denmark’s history and regional heritage. Citizens participate in parades, concerts, and community gatherings to reinforce national pride. The day underscores themes of unity, sovereignty, and remembrance of pivotal moments in Danish history.

Celebrated on June 15, National Salvation Day marks the return of Heydar Aliyev to power and the end of political crisis in 1993. The holiday signifies a turning point that led to national unity and set the stage for economic and social reforms. Official ceremonies include flag-raising, military parades, and presidential speeches. Cultural events, concerts, and exhibitions showcase Azerbaijani music, dance, and heritage. Citizens reflect on themes of solidarity, resilience, and nation-building. National Salvation Day reinforces pride in Azerbaijan's sovereignty and progress.