@jerry Years ago, a very smart friend of mine reposted some copypasta about how incredibly rare it was for a year to start on a Wednesday, something which hadn't happened for 400 years.
They weren't sharing it because they found it to be hilarious and they wanted to critique it. They were genuinely sharing it because they thought it was a weird quirk of the calendar and didn't bother flipping back a few years to see if it was even true.
This person was just sharing something for likes in 2010 or so. It's been about harvesting and driving interaction for a long long time, and those "could be ambiguous" math things are great for having gigantic arguments over. Just like the whole "The Dress" thing.