Well, outages seem to be distributed across all days except weekends. So this seems like people fucking around with stuff being a major factor.
Most outages are caused by changes by humans ("actors"?), very rarely are things "People just dig our stuff so much we can't keep up" but more often "We didn't think about this performance drawback when we built thing X, now it's hurting us", and of course, more outages when you try to fix those issues without fully considering the scope and impact.
Surely it just means more people working, resulting in more load, resulting in more outages?