> This is why we should not roll our own anything. This seems like a major overcorrection. It's equivalent to saying "you can't know anything" "no one is quali

> This is why we should not roll our own anything. This seems like a major overcorrection. It's equivalent to saying "you can't know anything" "no one is qualified to do anything" You really have to consider the downsides. In cryptography, "don't roll you own crypto" is the maxim because the downside is pretty bad. Make sure you're an expert before writing crypto. What's the downside to mis-parsing leap seconds? Maybe a 500 on a super rare request? Then they patch it and it's fine? Most computers are off by more than 1 second anyway. I think this mindset comes from developers looking into some field and realizing it's super deep ("Did you know there are missing dates in the gregorian calendar if you go back hundreds of years? Your time library is incorrect if it doesn't handle these cases!"). And sure, most things aren't completely correct, but you have to consider what the downside is to being slightly wrong. Maybe it'll be wrong in cases that will never actually happen in practice.