- Month of the Sorrows of the Blessed Virgin Mary: September is dedicated to the Sorrows of the Blessed Virgin Mary. This devotion invites the faithful to reflect on Mary's suffering, faith, and steadfast commitment to God's will throughout the seven sorrows of her life.
- September 1 - World Day of Prayer for the Care of Creation: World Day of Prayer for the Care of Creation is observed annually on September 1. The 2026 theme, chosen by Pope Leo XIV, is "They shall beat their swords into plowshares and their spears into pruning hooks" (Isaiah 2:4), highlighting the connection between peace, environmental stewardship, and care for creation.
- September 5 - Feast of St. Teresa of Calcutta: The Feast of St. Teresa of Calcutta honours the life and legacy of Mother Teresa, who dedicated herself to serving people experiencing poverty and hardship. Canonized by Pope Francis in 2016, she remains a model of compassion, service, and faith.
- September 7 - Ukrainian Heritage Day: Ukrainian Heritage Day celebrates the rich cultural traditions, history, and contributions of Ukrainian Canadians, whose presence has helped shape Canada's multicultural identity for more than 125 years.
- September 8 - International Literacy Day: International Literacy Day highlights the importance of literacy as a foundation for learning, personal growth, and participation in society. The day promotes awareness of literacy challenges and opportunities around the world.
- September 8 - Nativity of the Blessed Virgin Mary: The Nativity of the Blessed Virgin Mary commemorates the birth of Mary, the mother of Jesus. Celebrated by the Church since the fifth century, this feast recognizes Mary's unique role in salvation history and her faithful response to God's call.
- September 10 - World Suicide Prevention Day: World Suicide Prevention Day raises awareness about suicide prevention, encourages open conversations about mental health, and promotes support for individuals, families, and communities affected by suicide.
- September 11 - Rosh Hashanah (11-13): Rosh Hashanah is the Jewish New Year and marks the beginning of the High Holy Days. It is a time of prayer, reflection, renewal, and celebration within Jewish communities around the world.
- September 14 - Payroll Business, Finance & Accounting Professionals Day: Payroll Business, Finance & Accounting Professionals Day recognizes the individuals whose expertise supports financial operations, accountability, and organizational success. We celebrate our DCDSB experts who keep the numbers in check and ensure our financial stability. Your precision and dedication are the backbone of our success. Thank you for your invaluable contributions!
- September 15 - IT Professionals Day: IT Professionals Day recognizes the contributions of information technology professionals who manage, maintain, and support the systems and services that organizations rely on every day. Thank you to our incredible ICT staff for the critical role they serve in managing and maintaining DCDSB's technology, essential systems and applications that power our digital world.
- September 19 - Powley Day: Powley Day commemorates the landmark Supreme Court of Canada decision in R. v. Powley (2003), which affirmed Métis harvesting rights and remains a significant milestone in the recognition of Métis rights in Canada.
- September 21 - Feast of St. Matthew the Evangelist: The Feast of St. Matthew the Evangelist honours one of Jesus' twelve apostles and the author traditionally associated with the Gospel of Matthew. His life is remembered as a witness to faith, discipleship, and conversion.
- September 21 - International Day of Peace: Established by the United Nations, the International Day of Peace promotes peace among nations, communities, and individuals, and encourages efforts to build a more just and peaceful world.
- September 21 - Safe and Accepting Schools Week (21-25): Safe and Accepting Schools Week highlights the importance of creating positive learning environments where all students and staff feel welcomed, respected, safe, and included. We strive to create positive school climates where all members of the school community feel safe and accepted. During Safe and Accepting Schools Week, our schools will be focusing on school safety and will be scheduling various emergency response drills. Each day this week will focus on a theme that corresponds with this year’s spiritual theme.
- September 21 - Truth and Reconciliation Week (21-25): Truth and Reconciliation Week provides opportunities for learning and reflection on the histories, cultures, experiences, and contributions of First Nations, Inuit, and Métis peoples. The week helps prepare for the National Day for Truth and Reconciliation on September 30. During this significant week students and staff are encouraged to engage in reflection and learning of the history and current realities of First Nations, Inuit and Métis peoples. Truth and Reconciliation Week takes place the week before the National Day for Truth and Reconciliation on September 30. This is a day of solemn reflection and DCDSB school communities will be honouring the children who never returned home from residential schools, and offer thoughts and prayers to the survivors, their families and all those impacted by this painful history. To learn more about Truth and Reconciliation Week, please visit the National Centre for Truth and Reconciliation website.
- September 25 - Franco-Ontarian Day: Franco-Ontarian Day celebrates the history, culture, and contributions of Ontario's French-speaking community and recognizes its important role in the province's cultural diversity. We are proud to recognize the rich culture of the Francophone community living in Ontario, and today we celebrate the contributions of the French-speaking community in our province.
- September 26 - Feast of St. Isaac Jogues and Companions: The Feast of St. Isaac Jogues and Companions honours the North American Martyrs, Jesuit missionaries who shared the Gospel in North America during the 17th century and gave their lives in service to their faith.
- September 26 - Human Resources Professionals Day: Human Resources Professionals Day recognizes the contributions of HR professionals who support employee well-being, workplace culture, talent development, and organizational effectiveness. Today, we celebrate the HR heroes who work tirelessly behind the scenes to create a positive and thriving workplace. From talent acquisition to employee well-being, your dedication keeps our team strong and united. Thank you for all you do!
- September 28 - Right to Know Day: Observed during Right to Know Week, Right to Know Day promotes awareness of the public's right to access government information and the importance of transparency and accountability.
- September 28 - World Day of the Deaf: World Day of the Deaf occurs every year on the last Sunday of September, which always coincides with the International Week of the Deaf and International Day of Sign Languages. This observance was launched in 1958 by the World Federation of the Deaf to draw the attention of governments, NGOs, philanthropists, and the public to support the Deaf community worldwide, raising awareness of the challenge they face on a daily basis while recognizing their need for a safe space in society.
- September 29 - Solemnity of Saint Michael: This feast celebrates the Archangels Michael, Gabriel, and Raphael, who are named in Sacred Scripture. The Church honours their role as messengers and servants of God. We hear about angels in Scripture, but only three are named - Michael, Gabriel, and Raphael. Today, September 29th is their joint feast day. In the Archdiocese of Toronto, we especially give thanks to God for St. Michael, who is its patron. May St. Michael intercede on our behalf for courage, protection and divine intervention!
- September 30 - National Truth and Reconciliation Day: National Day for Truth and Reconciliation honours the children who never returned home from residential schools, survivors, their families, and communities. The day also coincides with Orange Shirt Day and promotes reflection, learning, and reconciliation. On National Day for Truth and Reconciliation, we recognize the tragic legacy of residential schools, the missing children, the families left behind and the survivors. Staff and students are invited to wear orange shirts to recognize the efforts of Phyllis Webstad a Stswecem’c Xgat’tem Shuswap First Nation woman who had her new orange shirt taken from her on her first day of residential ‘school’ in 1973. Please explore the Indigenous Education section of the Durham Catholic District School Board website to see available resources at dcdsb.ca/IndigenousEducation
- September 30 - Rowan’s Law Day: Rowan's Law Day raises awareness about concussion safety and prevention. Established in Ontario in 2018, the day promotes education about recognizing, managing, and preventing concussions in sport and recreational activities.