Historical GitHub Uptime Charts

View GitHub's monthly uptime between 2016 and 2026.

It’s biaised to show this without the dates at which features were introduced. A lot of the downtimes in the breakdown are GitHub Actions, which launched in August 2019; so yeah what a surprise there was no Actions downtime before because Actions didn’t exist.
You can click on "Breakdown" and then on "Actions" to hide it.
Even worse, those features show "100% uptime" pre-existence on the breakdowns page too.
This is the real questionable part of the graphic. It seems that no-data pre 2018 was just considered 100% uptime (which is hardly historically accurate).
Check the breakdown page. Like yes the magnitude is reduced obviously for individual services. But they all show the same trend.