[LEAPSECS] LEAPSECS Digest, Vol 45, Issue 1

Ian Batten igb at batten.eu.org
Thu Sep 2 15:24:07 EDT 2010


> I'd wager that UTC, whatever its realization, would likely trump any

> locally written laws.

It'll be interesting in the UK

* There's no doubt that UK legal time is GMT, Interpretation Act 1978,

* There's no doubt that whatever GMT is, it's solar, and there's no
doubt that whatever UTC is, it isn't solar and would be even less
solar without leap seconds,

* There's no doubt that proposed legislation to change UK legal time
to UTC failed to be passed in 1997, and an extensive history of the
issue got read into Hansard.

You'd have a hell of a job showing UK time was UTC in the face of that.

> After all, UTC has been a widely accepted

> approximation of the local laws that's attained the force of law

> through repetitive use

That's right, but |DUT1|<1 means that for the purposes of integer
arithmetic it's barely more than a rounding error. There's clear,
modern legislation to the contrary.

> (how many real-time realizations of UT1 are

> propagated, in comparison to UTC). So underlying technical changes to

> UTC may not change that. It would take a long, and complicated, legal

> argument to show that UT1 is what should be used

Not in the UK, see above.

> (even though nobody

> knows what it is, day to day).

That's the paradox, isn't it!


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