Earlier quoted context omitted.
> I like it, I will be formatting all my years to 5 digits from now on. Please don't, it's highly irritating and usually just serves as a way to get people to discuss the leading zero rather than the subject they were really interested in in the first place. Leading zeros aren't a thing for a reason. It's about as useful as expressing the temperature in Kelvin.
> Leading zeros aren't a thing for a reason. If they aren't a thing, why are we talking about them? Clearly they're a thing. And not even an obscure thing. If you've ever used commonly used representations like ZIP codes, bank account numbers, or serial numbers you'll no doubt have encountered it before. And that even goes for dates. ISO 8601, for example, requires leading zeros, including for the year component. "1"…
Because someone decided to break convention and use one in a four-digit year.