This visualization presents a yearly calendar as a radial wheel, with events displayed as colored arcs around the circle for each month. D3.js v4 handles the SVG rendering, converting day-of-year values into angular positions and drawing event arcs alongside month and quarter labels. The code includes an occupancy-checking mechanism that uses a matrix to track and avoid overlapping events across multiple rows. React provides the framework integration, while CSS controls the visual styling for event highlights and color-coded month segments.