A Calendar Chart displays time-series data as a grid of days grouped by week and month, making daily patterns and seasonal trends easy to spot. It is commonly used for activity heatmaps, attendance tracking, and contribution logs.
This sample recreates a GitHub-style contributions heatmap on a dark background. An ordinal color scale maps four activity levels to green shades, day cells use custom spacing with no-data fills, and tooltips display the contribution count for each day.
Follow the step-by-step Calendar Chart Tutorial to learn how such charts are built. See the Calendar Chart documentation for all configuration options.