This definitely falls under "really cool and completely pointless." One of the most important technology categories. :)

I had a much less sophisticated go with the Punch Card chart, a few years back.

Example Chart: https://github.com/jammaloo/PunchCardChart/graphs/punch-card

Repo: https://github.com/jammaloo/PunchCardChart

Obligatory mention: https://github.com/avinassh/rockstar

All we need now is a beatmaker chrome extension to feed this into and create a tune.

That heat map used to be a novel indicator of a user their activity. Now it just being abused these days.

That's very clever - but I can't keep thinking that you would go to hell for using it...

Finally a use for the GitHub heatmap.