How do you convert a UTC timestamp to Unix Time (seconds since the epoch)? "2020-04-29 04:48:15" → 1588135695 Of course the right answer is “you use a standard library function.” But what if you don’t have one available? Or what if you’re the person implementing that library? Converting the time portion is trivial. Unix Time pretends that leap seconds do not exist and makes every day exactly 86,400 seconds long. This is a fib on systems that implement UTC leap second insertion1, but...
