Arbor Day (Costa Rica)
Arbor Day in Costa Rica encourages citizens to plant and care for trees nationwide, fostering environmental stewardship and community engagement.
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.
Arbor Day (Costa Rica)
Christianfeast day:
Abraham of Clermont (or of St Cyriacus), Alice (or Adelaide) of Schaerbeek, Augustine of Hippo(Eastern Orthodox Church), BlessedAlbertina Berkenbrock, BlessedClement Vismara, Edburga of Winchester, Evelyn Underhill(Church of EnglandandThe Episcopal Church), Germaine Cousin, Landelin (of Crespin or of Lobbes), Trillo, Vitus (Guy), Modestus and Crescentia, June 15 (Eastern Orthodox liturgics)
Various Christian denominations commemorate multiple saints on June 15, honoring their faith, service, and theological contributions.
On June 15th, Christian traditions observe the lives of numerous saints including Abraham of Clermont, Augustine of Hippo, and others.
Abraham of Clermont is remembered as a founder of early monastic communities in Gaul.
Augustine of Hippo, a pioneering theologian, is honored for works like "Confessions" and "The City of God."
Feast days for Alice of Schaerbeek, Blessed Albertina Berkenbrock, and Germaine Cousin highlight examples of charity and faith.
Eastern Orthodox liturgics additionally commemorate Vitus, Modestus, Crescentia, and other early martyrs.
Services and liturgies across the Church of England, Episcopal Church, Catholic, and Orthodox traditions include prayers, hymns, and readings.
The collective celebration offers the faithful reflections on devotion, sacrifice, and theological insight.
feast day
Abraham of Clermont (or of St Cyriacus)
Alice (or Adelaide) of Schaerbeek
Augustine of Hippo
Eastern Orthodox Church
Blessed
Albertina Berkenbrock
Clement Vismara
Edburga of Winchester
Evelyn Underhill
Church of England
The Episcopal Church
Germaine Cousin
Landelin (of Crespin or of Lobbes)
Trillo
Vitus (Guy), Modestus and Crescentia
June 15 (Eastern Orthodox liturgics)
Day of ValdemarandReunion Day(Flag Day) (Denmark)
Denmark's Day of Valdemar and Reunion Day, marked as Flag Day, celebrates historical reunification and national unity each June 15.
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.
Day of Valdemar
Reunion Day
Flag Day
Engineer's Day (Italy)
Italy's Engineer's Day honors the nation's engineering professionals and their contributions to innovation and infrastructure.
Celebrated on June 15, Engineer's Day in Italy recognizes engineers across civil, mechanical, electrical, and environmental disciplines.
The National Council of Engineers organizes conferences, workshops, and exhibitions showcasing cutting-edge projects.
Universities and associations host design challenges and hackathons to engage students and young professionals.
Awards are presented for outstanding work in sustainable development, digital transformation, and infrastructure resilience.
Public lectures highlight engineering's role in addressing societal challenges like climate change and smart cities.
The day fosters collaboration between industry, academia, and government to advance Italy's technological leadership.
Engineer's Day (Italy)
Global Wind Day(international)
Global Wind Day is an international observance celebrating wind energy’s role in a sustainable and low-carbon future.
Held annually on June 15, Global Wind Day is organized by WindEurope and the Global Wind Energy Council.
The event promotes wind power as a clean, renewable source critical for tackling climate change.
Activities include wind farm tours, educational workshops, and online webinars featuring industry experts.
Interactive maps and virtual events allow participants to explore global wind energy projects.
Global Wind Day encourages policymakers, businesses, and communities to support wind energy deployment.
The day highlights technological advances, economic benefits, and environmental impact of wind power worldwide.
Global Wind Day
international
National Beer Day (United Kingdom)
National Beer Day in the UK celebrates beer's cultural heritage and the liberalization of beer sales on June 15, 1830.
Observed on June 15, National Beer Day marks the 1830 Beerhouse Act, which democratized beer sales across England.
Pubs and breweries host tastings, brewery tours, and events spotlighting cask ales and craft beers.
Beer enthusiasts raise glasses in community gatherings, celebrating regional brewing traditions.
Historical talks and exhibitions explore beer’s role in British society and economy.
Special promotions encourage patrons to sample local and artisanal brews.
The day underscores beer’s social significance and its enduring place in UK culture.
National Beer Day (United Kingdom)
National Salvation Day(Azerbaijan)
Azerbaijan's National Salvation Day commemorates the restoration of stability and independence on June 15, 1993.
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.
National Salvation Day
Azerbaijan
Abraham of Clermont (or of St Cyriacus)
Feast day of Abraham of Clermont, a 6th-century monastic founder and ascetic, observed on June 15.
Abraham of Clermont, also known as St. Cyriacus, is commemorated for founding monastic communities in Gaul during the 6th century.
His life of asceticism and prayer inspired the growth of Western monasticism.
On his feast day, Catholic and Orthodox liturgies include special hymns and readings about his virtues.
Pilgrims visit shrines dedicated to him, seeking spiritual guidance and healing.
The celebration honors his legacy of humility, piety, and dedication to communal life.
Abraham of Clermont (or of St Cyriacus)
Alice (or Adelaide) of Schaerbeek
Feast day of Alice of Schaerbeek, a 13th-century Cistercian nun celebrated for her devotion and charity.
Alice of Schaerbeek, born in Brussels, joined the Cistercian convent at La Cambre and dedicated her life to prayer and helping the poor.
Despite suffering from leprosy and blindness, she remained a model of compassion and faith.
Her feast day on June 15 is observed with Masses, processions, and charitable works in Belgium and beyond.
Pilgrims venerate her tomb and participate in acts of kindness inspired by her example.
The celebration highlights themes of perseverance, service, and divine grace.
Alice (or Adelaide) of Schaerbeek
Augustine of Hippo(Eastern Orthodox Church)
Eastern Orthodox feast day of Augustine of Hippo, the influential theologian and Church Father, on June 15.
Although Western churches honor him on August 28, the Eastern Orthodox Church commemorates Augustine of Hippo on June 15.
Born in 354 in Roman Africa, he served as Bishop of Hippo and shaped Christian theology through works like "Confessions" and "The City of God."
On his feast day, Orthodox liturgies feature readings, hymns, and lectures on his writings.
Faithful reflect on his teachings about grace, original sin, and the nature of the Church.
The day emphasizes Augustine's enduring legacy in theology, philosophy, and education.
Augustine of Hippo
Eastern Orthodox Church
BlessedAlbertina Berkenbrock
Feast day of Blessed Albertina Berkenbrock, a young Brazilian martyr beatified by the Catholic Church.
Blessed Albertina Berkenbrock (1919–1931) was a Brazilian teenager who died defending her purity and faith. Kidnapped and attacked by a local farmhand, she resisted his advances and was killed, becoming a symbol of chastity and courage. Pope John Paul II beatified her in 2007, and her feast day on June 15 honors her unwavering devotion and sanctity. Pilgrims visit her shrine in Três Passos, Rio Grande do Sul, seeking inspiration from her steadfast faith. Her story highlights the virtues of resilience and moral integrity.
Blessed
Albertina Berkenbrock
BlessedClement Vismara
Feast day of Blessed Clement Vismara, Italian Salesian missionary known for his work in Burma.
Blessed Clement Vismara (1897–1988) devoted over sixty years to missionary work among the people of Burma (now Myanmar). A Salesian priest, he established schools, clinics, and missions in challenging environments, emphasizing education and healthcare. Beatified in 2002, his feast on June 15 celebrates his compassionate spirit and dedication to serving the poorest communities. His writings and letters offer insight into missionary zeal and intercultural respect. Communities he served continue to honor his legacy through charitable works.
Clement Vismara