September 13

On 13 September, various Christian denominations commemorate the Feast of the Cross, reflecting on the significance of the instrument of Christ’s crucifixion. This observance is particularly noted in the Eastern Orthodox and Assyrian Church of the East. The day also honors an array of saints: Aimé (Amatus), a medieval monastic leader; John Chrysostom, renowned for his eloquent homilies; Marcellinus of Carthage, a third-century martyr; and other figures of early church history. Through liturgies and prayers, believers recall the faith and sacrifices of these holy persons. Festive services, processions, and readings from scripture bring communities together in remembrance and praise.

Established in Russia in 2009, Day of the Programmer celebrates software developers and their impact on modern life. Held on the 256th day of the year—symbolic of an 8-bit byte—it highlights the foundational role of programming. Tech companies, educational institutions, and coding communities host workshops, hackathons, and meetups in recognition of this day. Events often include coding challenges and talks by industry experts to inspire both seasoned professionals and aspiring developers. Although not an official public holiday, it has grown into a widespread cultural observance among tech enthusiasts.

Observed annually in Mexico on 13 September, Día de los Niños Héroes commemorates six teenage military cadets who died defending Chapultepec Castle against U.S. forces in 1847. The story of their bravery has become a symbol of national pride and sacrifice. Schools and military academies hold ceremonies, laying wreaths at monuments dedicated to the cadets. The day serves as a reminder of Mexico’s historical struggles and the courage of its youth. Families across the nation reflect on patriotic values and the cost of sovereignty.

Engineer's Day in Mauritius celebrates the achievements of engineering professionals and their role in building the nation’s infrastructure. Marked on 13 September, the day features conferences, technical exhibitions, and award ceremonies highlighting engineering projects across sectors such as transportation, energy, and construction. Universities and engineering institutions host seminars and student competitions to foster interest in science and technology careers. Government bodies and industry associations use the occasion to discuss future challenges and sustainable development goals. Through public lectures and site visits, citizens gain insight into engineering’s impact on society.

Celebrated in regions including the United Kingdom, Africa, and Latin America, Roald Dahl Day honors the birthday of the famed British author, born on 13 September 1916. Fans and literary lovers mark the occasion with readings of classics like Charlie and the Chocolate Factory, Matilda, and The BFG. Schools and libraries organize storytelling sessions, costume events, and creative writing workshops inspired by Dahl’s whimsical worlds. Publishers often release special editions and host promotional events to engage readers of all ages. The day underscores the enduring legacy of Dahl’s playful yet profound narratives.

On 13 September, the Assyrian Church of the East celebrates the Feast of the Cross, a solemn service honoring the discovery and power of the True Cross. The observance includes special prayers, hymns, and liturgical readings that reflect on themes of sacrifice and redemption. Clergy and laity participate in processions, sometimes carrying a cross relic or symbolic icon through the church. The day reinforces the central Christian belief in Christ’s victory over death through his crucifixion. Following the service, congregations often share a communal meal as part of the feast’s joyful remembrance.

Saint Aimé, also known as Amatus, is commemorated on 13 September for his life of monastic devotion and service to the early Christian community. Though historical records are scarce, tradition holds that he guided his flock with humility and compassion. As a bishop, he is remembered for his gentle leadership and charitable outreach to the poor. Over the centuries, monastic communities have honoured his memory through prayers and liturgical feasts. The day offers believers an opportunity to reflect on virtues of faith, service, and spiritual discipline.

John Chrysostom (c. 347–407) served as Archbishop of Constantinople and became renowned for his powerful preaching, earning the title “Golden-Mouthed.” His homilies and writings shaped Christian liturgy and theology, emphasizing social justice and moral integrity. After his elevation to the episcopate, he implemented reforms to aid the poor and criticized abuses of wealth among the elite. Exiled for his outspoken views, his legacy endured through the preservation and study of his sermons. Both Eastern Orthodox and Western churches commemorate his life and teachings on 13 September, celebrating his enduring influence on Christian thought.

Saint Marcellinus of Carthage is commemorated on September 13 for his steadfast devotion to the Christian faith. Historical records are scarce, but tradition remembers his courage during times of persecution. His example encourages believers to remain faithful under trials and to trust in divine providence. Church services on this day include prayers and hymns that honor his life and witness. Observing his feast invites reflection on the power of faith and the legacy of early Christian martyrs.

Saint Maurilius of Angers is honored on September 13 for his dedicated service as a bishop in early medieval France. He is remembered for his commitment to pastoral care and the building up of Christian communities. Traditions highlight his role in guiding the faithful through teaching and acts of charity. Celebrations often feature liturgical services, prayers, and reflections on his life and works. His feast day offers an opportunity to explore the history of the Church in Gaul and its early shepherds.