A circular "year wheel" visualization displays a calendar year as concentric rings, with each month divided into a grid of day cells. Colored segments represent events from a hardcoded dataset, including meetings, holidays, and seasonal periods, while quarter and month labels provide temporal context. The visualization is built with D3 v4 and React, using SVG shapes and animations to render the wheel. Users can switch between purple, red, and blue color schemes via radio buttons, which dynamically update the event and background fills.