A radial year-wheel calendar displays twelve months as concentric arcs around a central donut, with events positioned along date-specific tracks. The visualization renders a full year of human-resource deadlines, meetings, and holidays using hardcoded sample data. D3 v5 calculates day-of-year positions, maps event dates to polar coordinates, and draws SVG paths for month segments, week bands, and event rects. Hover interactions trigger tooltips showing event details, while color-coded fills distinguish quarterly and monthly regions.