This calendar heat map is based on the Quick Start example in rChartsCalendar. The HTML file was first generated using rChartsCalendar and then further edited in text mode.
Modified http://d3js.org/d3.v3.min.js to a secure url
Modified http://cdn.jsdelivr.net/cal-heatmap/3.3.10/cal-heatmap.min.js to a secure url
https://d3js.org/d3.v3.min.js
https://cdn.jsdelivr.net/cal-heatmap/3.3.10/cal-heatmap.min.js