Cal-Heatmap is a javascript module to create calendar heatmap to visualize time series data, a la github contribution graph
This sub-fork of @glutanimate's one (which implemented the day letter visualization on the left), implements also onMouseOver and onMouseOut callbacks, and avoids the default tooltip to appear.
This module will help you to create a calendar, like the contribution calendar appearing on each github user's page, but with navigation and more controls on the data formatting.
See documentation for examples.