Christianfeast day:

Drina Martyrs, Drostan(Aberdeen Breviary), John HordenandRobert McDonald(Episcopal Church (USA)), Maria Crocifissa di Rosa, Mesmin, Valerian of Abbenza, Virginia Centurione Bracelli, December 15 (Eastern Orthodox liturgics)

A collective observance of Christian feast days celebrating a range of saints and martyrs recognized on December 15 across various denominations.
On December 15, Christians honor multiple saints and martyrs in Western and Eastern traditions. The observance includes the Drina Martyrs, nuns martyred during World War II, and Saint Drostan, a 6th-century Scottish bishop. The Episcopal Church (USA) commemorates Bishop John Horden and Reverend Robert McDonald for their missionary work in Canada. Saint Maria Crocifissa di Rosa, Mesmin, Valerian of Abbenza, and Virginia Centurione Bracelli are also celebrated for their faith and service. Liturgical services range from solemn Masses to special prayers and readings that reflect on sacrifice and devotion.
feast day Drina Martyrs Drostan Aberdeen Breviary John Horden Robert McDonald Episcopal Church (USA) Maria Crocifissa di Rosa Mesmin Valerian of Abbenza Virginia Centurione Bracelli December 15 (Eastern Orthodox liturgics)

Drina Martyrs

A Catholic feast day honoring the Drina Martyrs, nuns martyred in Bosnia for their faith during World War II.
The Drina Martyrs were a group of Catholic nuns who lost their lives in Bosnia during World War II while sheltering refugees. Their courage and compassion in the face of persecution have made them symbols of faith and sacrifice within the Church. On December 15, pilgrims visit memorial sites and participate in Masses dedicated to these martyrs, reflecting on their legacy. The feast day highlights the role of religious sisters in times of conflict and the power of charitable service under hardship. Communities hold prayer vigils, share testimonies, and promote awareness of the martyrs’ story as an example of devotion and resilience.
Drina Martyrs

Drostan(Aberdeen Breviary)

A feast honoring Saint Drostan, a 6th-century Scottish missionary bishop featured in the Aberdeen Breviary.
Saint Drostan was a disciple of Saint Columba who established monastic settlements in Aberdeenshire during the 6th century. His life and miracles are recorded in the medieval Aberdeen Breviary, reflecting the spread of Celtic Christianity. On December 15, Scottish parishes and historical societies commemorate his missionary journeys with special services. Pilgrimages to churches and holy wells bearing his name are traditional elements of the feast day. The observance celebrates early monastic devotion, community evangelism, and the enduring influence of Drostan’s legacy.
Drostan Aberdeen Breviary

John HordenandRobert McDonald(Episcopal Church (USA))

An Episcopal Church (USA) commemoration of Bishop John Horden and Reverend Robert McDonald, pioneers of missionary work in Canada.
On December 15, the Episcopal Church (USA) honors Bishop John Horden and Reverend Robert McDonald for their missionary service among Indigenous communities in Canada. John Horden served as the first Anglican Bishop of Moosonee, advocating for education and pastoral care in remote regions. Robert McDonald translated religious texts into Ojibwe and worked closely with First Nations, setting precedents for intercultural ministry. Churches observe the day with readings, sermons on reconciliation, and reflections on cross-cultural outreach. The feast highlights the enduring impact of early missionary efforts on community development and interfaith dialogue.
John Horden Robert McDonald Episcopal Church (USA)

Maria Crocifissa di Rosa

Feast day celebrating Saint Maria Crocifissa di Rosa, an Italian nun and founder of the Sisters of the Holy Family of Verona.
Maria Crocifissa di Rosa founded the Sisters of the Holy Family of Verona in the mid-19th century, dedicating her life to serving the sick and poor. Born in 1813, she pioneered charitable initiatives and established hospitals, schools, and orphanages in northern Italy. Canonized in 1954, her legacy continues through international congregations that uphold her mission of compassion. On her feast day, religious communities mark the occasion with Masses, processions, and social outreach activities. The observance inspires acts of charity, community service, and the promotion of dignity for marginalized populations.
Maria Crocifissa di Rosa

Mesmin

Feast day commemorating Saint Mesmin, a 6th-century monk and abbot known for his ascetic life and founding a monastery near Orléans.
Saint Mesmin was a disciple of Saint Euspicius who embraced the ascetic monastic life in 6th-century Gaul. He founded a monastery near Orléans that became a center of spiritual learning and devotion. His leadership attracted many to monasticism and he was revered for his humility and austerity. Pilgrims visited his tomb seeking spiritual guidance and healing. The annual observance on December 15 honors his contributions to early Western monastic traditions and his enduring legacy of faith.
Mesmin

Valerian of Abbenza

Commemoration of Saint Valerian of Abbenza, a 5th-century North African bishop and martyr remembered for his steadfast faith under persecution.
Saint Valerian served as bishop of Abbenza in North Africa during the early 5th century. Under the Vandal king Huneric, he faced exile for refusing to abandon his Catholic beliefs. His courage in the face of persecution inspired the Christian community and solidified his reputation as a martyr. Stories of his endurance and faith were passed down through generations of believers. December 15 celebrates his sacrifice and highlights the trials faced by early Church leaders in North Africa.
Valerian of Abbenza

Virginia Centurione Bracelli

Celebration of Saint Virginia Centurione Bracelli, a 17th-century Genoese noblewoman renowned for her charitable work and founding institutions to care for the needy.
Born into a noble family in Genoa in 1587, Virginia Centurione Bracelli devoted her life to serving the poor, orphans, and marginalized women. After the death of her husband, she established the Congregation of the Daughters of Our Lady Help of Christians, opening hospitals, orphanages, and shelters across the city. Her unwavering compassion and innovative social programs set new standards for charitable care. Canonized by the Catholic Church in 2003, she left a lasting impact on Christian social work. Her feast on December 15 honors her legacy of mercy and service to society’s most vulnerable.
Virginia Centurione Bracelli

December 15 (Eastern Orthodox liturgics)

Eastern Orthodox liturgical commemorations for December 15, marking several saints and feasts observed by Orthodox Christians worldwide.
December 15 in the Eastern Orthodox calendar is dedicated to the remembrance of various saints and sacred events. The liturgical services include specific hymns, scripture readings, and prayers that reflect the virtues and histories of the commemorated saints. Believers gather for Divine Liturgy, venerating icons and partaking in communal prayers. The day emphasizes spiritual reflection, charity, and the continuity of Orthodox tradition. Many parishes also host fellowship meals or charitable activities following the services to foster community bonds.
December 15 (Eastern Orthodox liturgics)