# Catholic Church celebrates centenary of World Mission Sunday > Live situation record from CLSTR: https://clstr.news/situations/catholic-church-global-anniversary-observances > Updated: 2026-10-22T07:43:28.000Z. Sources: 108. Developments: 12. The Catholic Church is celebrating the centenary of World Mission Sunday, observed on October 17-18, 2026. This milestone marks 100 years since the observance was established by Pope Pius XI in 1926. Under the theme ‘One in Christ, United in Mission,’ Pope Leo XIV has called for believers to engage in evangelization through both spiritual prayer and material aid, emphasizing that unity among disciples strengthens the impact of their testimony. Global observances have highlighted diverse regional responses. In Spain, the Pontifical Mission Societies launched the ‘El Domund al descubierto’ exhibition in Vitoria to showcase missionary work across Africa, America, Asia, and Oceania. In Mexico, Monsignor Víctor Sánchez Espinosa, Archbishop of Puebla, called on the faithful to be ‘missionary disciples’ in daily life and to pray for national peace. In Italy, dioceses held prayer vigils, including services in San Miniato and Carpi, the latter honoring the memory of Don Francesco Cavazzuti through symbolic tributes. Other regional activities included musical masses in Brazil, indigenous outreach in India, and community support initiatives in Paraguay and Bosnia and Herzegovina. To mark the centenary, the Apostolic Penitentiary granted a plenary indulgence to those participating devotedly in the Marian Rosary, receiving confession, and participating in Eucharistic Communion. As the initiative continues, the focus has shifted toward poverty relief in Madagascar, a nation facing hunger and malnutrition due to droughts and cyclones. In Germany, the Diocese of Fulda and missio Aachen are soliciting donations for social and pastoral work in impoverished regions. To highlight these needs, guests from Madagascar are participating in approximately 200 events across Germany to share local challenges and solutions, specifically regarding aid and education in the Archdioceses of Toliara and Toamasina. ## Claims - True love is a deep commitment and a life covenant rather than a fleeting emotion. (corroborated by 2 sources) - The 100th World Mission Sunday will be observed on October 18. (corroborated by 2 sources) - The theme for the 100th World Mission Sunday is 'One in Christ, united in mission'. (corroborated by 2 sources) - Bishop Szymon Stułkowski stated that the heart can be the most difficult mission territory. (corroborated by 2 sources) - Pope Leo XIV has written a prologue for a new edition of the YouCat catechism titled 'Love Forever'. (single source) - The new edition of YouCat: Love Forever is scheduled for release in November. (single source) - Pope Leo XIV intends to revisit and discuss the document 'Amoris Laetitia' with bishops. (single source) - A Vatican meeting for the heads of the world's conferences of bishops regarding 'Amoris Laetitia' is scheduled for October 7-14. (single source) - In Poland, World Mission Sunday is extended into a Mission Week. (single source) - Missionaries require both prayer and financial support. (single source) ## Timeline ### 2026-10-22: World Mission Sunday focuses on Madagascar poverty relief World Mission Sunday on October 25 focuses on Madagascar, raising funds and awareness for poverty, hunger, and infrastructure challenges in one of the world's poorest nations. 2 sources. https://clstr.news/cluster/world-mission-sunday-focuses-on-madagascar-poverty-relief ### 2026-10-21: Italian dioceses hold prayer vigils for World Mission Day Dioceses in San Miniato and Carpi are organizing prayer vigils for the 100th World Mission Day, honoring missionary service and the legacy of Don Francesco Cavazzuti. 2 sources. https://clstr.news/cluster/italian-dioceses-hold-prayer-vigils-for-world-mission-day ### 2026-10-18: Catholic communities celebrate 100 years of World Mission Day Catholic dioceses in Brazil and India are celebrating the centenary of World Mission Day through mass, prayer, and community activities to reinforce the global call to missionary work. 2 sources. https://clstr.news/cluster/catholic-communities-celebrate-100-years-of-world-mission-day ### 2026-10-18: Mexican bishops call for peace during World Mission Sunday Mexican bishops are calling for prayers for peace and national intercession during the 100th anniversary of World Mission Sunday (DOMUND 2026). 5 sources. https://clstr.news/cluster/mexican-bishops-call-for-peace-during-world-mission-sunday ### 2026-10-16: World Mission Sunday celebrates its centenary The Catholic Church celebrates the 100th anniversary of World Mission Sunday. Pope Leo XIV calls for unity under the theme ‘One in Christ, united in mission’ to renew global evangelization efforts. 48 sources. https://clstr.news/cluster/vatican-marks-centenary-of-world-mission-sunday-with-plenary-indulgence ### 2026-10-14: World Mission Sunday celebrates 100 years of global Catholic solidarity The Catholic Church marks the 100th anniversary of World Mission Sunday with the theme “One in Christ, United in Mission,” organizing global prayer and fundraising for vulnerable communities. 15 sources. https://clstr.news/cluster/catholic-church-marks-100th-anniversary-of-world-mission-day ### 2026-10-13: Polish Episcopal Conference prepares for 100th World Mission Sunday The Polish Episcopal Conference is preparing for the 100th World Mission Sunday on October 18, emphasizing the need for prayer and financial support for missionaries. 6 sources. https://clstr.news/cluster/polish-episcopal-conference-prepares-for-100th-world-mission-sunday ### 2026-10-12: World Mission Sunday marks centenary in 2026 The Catholic Church marks the 100th anniversary of World Mission Sunday on October 18, 2026, with Pope Leo XIV calling for renewed commitment to global missionary work and evangelization. 4 sources. https://clstr.news/cluster/world-mission-sunday-marks-centenary-in-2026 ### 2026-10-07: Catholic Church marks 100th anniversary of World Mission Sunday The Catholic Church marks the 100th anniversary of World Mission Sunday, focusing fundraising and awareness efforts on Ethiopia and Madagascar to support social and pastoral work in impoverished regions. 2 sources. https://clstr.news/cluster/catholic-church-marks-100th-anniversary-of-world-mission-sunday ### 2026-10-05: Pope Leo XIV convenes Vatican meeting to mark 10 years of Amoris Laetitia Pope Leo XIV is hosting a Vatican meeting for global bishops to mark the 10th anniversary of Amoris Laetitia and discuss modern family challenges, alongside calls for unity for World Mission Sunday. 19 sources. https://clstr.news/cluster/pope-leo-xiv-issues-appeal-for-100th-world-mission-sunday ### 2026-10-04: Catholic Church celebrates centenary of World Mission Sunday The Catholic Church celebrates the 100th anniversary of World Mission Sunday, marking a century of global missionary work and evolving its focus toward both international support and local community engagement. 4 sources. https://clstr.news/cluster/catholic-church-celebrates-centenary-of-world-mission-sunday ### 2026-09-27: Catholic Church celebrates 100th World Mission Sunday The Catholic Church marks the 100th anniversary of World Mission Sunday in October 2026, featuring themed celebrations and missionary exhibitions in Vitoria, Spain. 2 sources. https://clstr.news/cluster/catholic-church-celebrates-100th-world-mission-sunday --- Cite as: Catholic Church celebrates centenary of World Mission Sunday. CLSTR, https://clstr.news/situations/catholic-church-global-anniversary-observances