Github January 28th Incident Report
github.com/blog/2106-january-28th-incident-report
From the page
Saved with the link. Notes from 2007 to 2016 are mostly the page's own words, so this is probably an excerpt.
Last week GitHub was unavailable for two hours and six minutes. We understand how much you rely on GitHub and consider the availability of our service one of the core features we offer. Over the last eight years we have made considerable progress towards ensuring that you can depend on GitHub to be there for you and for developers worldwide, but a week ago we failed to maintain the level of uptime you rightfully expect.