Right, I'm not disagreeing with any of that except to say it's application is not ubiquitous and thus not universally applied despite the fact that it's part of

Right, I'm not disagreeing with any of that except to say it's application is not ubiquitous and thus not universally applied despite the fact that it's part of a common O/S. If it were then the DST problem would not have arisen or that it would have been much easier and qicker to solve. (That is, not every one understands the issue to the point where it's no longer the subject of debate - ipso facto, the fact that we're having this debate on HN demonstrates that lack of universality.) A similar system with a niche application which also possesses truly advanced relativistic timekeeping features is the software for GPS satellites. However it too hasn't been universally applied (needless to say, it'd also likely require extensive modification if it were to be adapted for the use that we're discussing here, that said, no doubt the basic algorithms would be adaptable).