Find Out More Part of Chalice Children Learn how congregations participate in the UUA's Green Sanctuary program. Watch the video "What Is Earth Day? A History" on YouTube. Read a sermon by Rev. Tracey Robinson-Harris, "Earth Day in Urgent Times," on the UUA Worship Web. PREVIOUS: Taking It Home UP: Session 36: Earth Day NEXT: Session 37: Mother's/Father's Day Download all of Chalice Children (Word) (PDF) to edit or print.