[akira2501]

"Once the drift is appreciable, the argument goes, a correction could be added much further down the line, perhaps by adding a leap minute or hour."

Well.. if the leap second is any lesson, that should go smoothly and be really easy to implement.

[blahedo]

True, although for the same reasons that "fail fast" is sometimes better than the alternatives, a "leap hour"---being much easier to perceive than a leap second---may be easier to work with. At least then you'll know if someone's off because they didn't leap, vs some sort of clock drift or other error.

[greglindahl]

Wait - for "fail fast" reasons, we're going to do something important every few thousand years, instead of about once a year?!

[upofadown]

If it is an hour then you would just change the time zones ... assuming that we even still have those.