[LEAPSECS] "China move could call time on GMT"
Warner Losh
imp at bsdimp.com
Wed Jan 4 14:58:14 EST 2012
On Jan 4, 2012, at 12:45 PM, Tony Finch wrote:
> Steve Allen <sla at ucolick.org> wrote:
>>
>> Happy New Year!
>>
>> How did I tell that it became the new year?
>> By the civil calendar date changing from Dec 31 to Jan 1.
>> How did I tell when the civil calendar date changed?
>> By looking at my clock set using UTC, which is, at present, connected
>> to the rotation of the earth, and thus to days.
>> The draft revision of ITU-R TF.460 removes the connection between UTC
>> and the rotation of the earth,
>
> Correct up to this point.
>
>> thus disconnecting the civil calendar date from the sun.
>
> Incorrect, because the civil calendar is tied to local solar time using
> the time zone system. Local civil time is not going to move out of sync
> with the sun, and therefore the calendar will also remain in sync.
Do people have a notion how we'll recon time when the accumulated delta becomes large (like on the order of 100k seconds)? UTC+27?
Warner
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