Last night I discussed with my husband, and he said there were probably more rules about leap years than the basic every 4. I’m glad you know the rules.
It was a big deal in the world of software in 99. Y2K wasn’t just about the first 2 digits. And there was some alpha nerd going on about all this.
Then of course there’s the occasional leap second that nobody is really sure when they happen, except when we’re told to.