This is something I was completely unaware of, and apparently something that relates to the naming of the epoch that followed the dark ages. The Northern Hemisphere went through around 18 months of "dusk" rather than sunlight as the result of a massive volcanic eruption, causing temperatures to plunge, famine, disease and massive mortality. I thought this was interesting from a variety of standpoints. First, because there may be some who have memories of a time when the sun never shone and don't know when/where that could be. Second, because it shows what a massive volcanic eruption can do. Third, because it makes me wonder how we would cope if this happened today (not well). Fourth, because on the "Future" thread, one of the themes that comes up is that something has happened that radically impacted the planet. This could be one candidate: https://www.dailymail.co.uk/sciencetech/article-6397621/Why-536-AD-worst-year-alive.html For me there was also another, strangely enough. This was just a few years after the anathemas were pronounced against Origen and the alleged doctrines of the Origenists. Somehow it seemed appropriate that darkness should follow.