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by marcosdumay 1327 days ago
If you need better precision, you don't go converting to/from civil time, because people think on quanta of ~1 second and better precision is not defined there.

Instead, I'll put my rule here: It's perfectly reasonable to drop your time precision to ~1 second when converting it into "people time", and you should never expect better precision from a back conversion.

That's not saying you don't need TAI. It's just not reasonable to mix it and UTC et. al. If you need TAI, you live in TAI.