So what would we need to change? It seems like we just need to further document the kind of construction/conversion we're doing so that if people are really interested, they can find out what exactly we're supporting. From a routine user's perspective though, I don't think they're going to think twice that we call our `DateTime`s UTC, support leap seconds, and inputting dates pre 1972 isn't anything different. Again, I'm definitely open to changing the default abbreviation here if that simplifies things. Or not have an abbreviation at all since it seems like it could lead to confusion. Maybe that's best: no abbreviation and we clearly document how construction/conversion works.