The day of the week thing about calendar dates is something that triggers me when I see it in the media. It is absurdly obvious that, within the current calend

The day of the week thing about calendar dates is something that triggers me when I see it in the media. It is absurdly obvious that, within the current calendar system, that feat is a math trick which can be learned and practiced. A quick Googling even reveals how to execute the calculation with alacrity. Yet, it continues to be upheld in almost every appearance in the media I’ve seen as an indication of photographic memory. I can pull that trick off and I definitely don’t have photographic memory. I just happened to learn it to demonstrate a point.