536

'Ask medieval historian Michael McCormick what year was the worst to be alive, and he's got an answer: "536." ... A mysterious fog plunged Europe, the Middle East, and parts of Asia into darkness, day and night—for 18 months.'

According the article, massive crop failures followed, resulting in a mass starvation of human beings. Some scientific researchers believe that the mystery fog was probably due to the eruption of an Icelandic volcano. This claim is based on some very high-tech ice-core studies.

When it comes to years, 536
Is apparently the roughest of picks.
I don’t remember it, but as you can probably intuit,
I did have ancestors who lived through it.