World Communion Sunday is observed on the first Sunday of October, bringing Christians together globally to celebrate their unity through a shared Communion service. This observance emphasizes the interconnectedness of various Christian denominations and fosters collaboration among them. Participants partake in bread and wine, symbolizing their shared faith in Jesus Christ and their collective mission, regardless of geographical or denominational differences. Celebrations often include cultural music and hymns, creative Communion services, and community engagement through sharing diverse communion traditions. Originating in 1933 at Shadyside Presbyterian Church in Pittsburgh, Pennsylvania, it was promoted by the National Council of Churches by 1940, highlighting the global nature of the Christian faith.