"Mentally finding out the day of the week for any date is a skill you can easily learn. You don’t need to be an autistic genius – all it takes is basic memorization effort and some trivial math.
When I first learned this technique many years ago, I did it just for fun. With time, I learned to enjoy the convenience of not needing a calendar anymore. It’s far more useful than I first thought, and with just a little practice, you’ll be able to find out the days of the week much faster than when reaching for a calendar."
By Luciano Passuello
From Denny: How cool is this??! Explained simply and quickly.
