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  3. October 2014

Re: daylight savings nov 2 (US)

On Thu, Oct 23, 2014 at 3:51 PM, <rob@xxxxxxxxx> wrote:
Yes, but neither talks about how the system slows down or speeds up the
clock.

For example, let's say it is the fall switch. It's about 2am on that
Sunday. Time goes to any absolute crawl. From 1:59am to 2:00am takes
about an hour. That way you never experience the same time twice. Of
course, writing a million records using timestamp as the unique key can be
'interesting'.
I'm not saying this is exactly what is happening. I'm just looking for
something that explains how they do this adjustment.

I'm intrigued by this as well. (And frankly a bit nauseated too.)
They do emphasize that it's gradual. Maybe someone should write a
program that goes out and periodically retrieves NIST time and
compares it to system time. (I would do this myself, but (a) I don't
think we use the gradual time change, and (b) I don't think our i is
set up for Internet access.)

John Y.

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