This radial "fork" calendar arranges a full year of days along the circumference of a circle, with months (and quarters) drawn as concentric colored arc segments. Events are encoded as thicker, prominent arcs positioned by their start and end dates, using `d3.arc()` with angles computed from the day of the year. The visualization is rendered as an SVG in a React app with D3 v4, with month and quarter bands colored distinctly and event arcs highlighted. The circular layout supports at-a-glance comparison of seasonal and quarterly spans, and the minimal code example includes commented-out event data for customization.