We humans are creatures of days and dates, though most fade quickly into the fog of memory. Researchers have recently identified a newly discovered phenomenon called “hyperthymesia,” more commonly known as “autobiographical memory.” Those who possess this condition are able to remember the most precise details of every day of their lives. Mention a date and they can tell you where they were, what they were doing, and what of significance happened in the world on that day. These people remember every single day, including those in which nothing out of the ordinary happened. It is, we can only assume, a gift of sorts. Most of us do not possess this gift, nor can we really imagine it.