On 2/8/2011 9:51 AM, Clive D.W. Feather wrote:
Gerard Ashton said:
A secular change to civil time that would be perceptible without the aid
of a clock has
never been introduced,
How about those places that moved timezone permanently.
A single permanent time zone change is not a secular change; in this
context a secular change is
one that increases indefinitely, as opposed to a periodic change, in
which the positive and negative
changes cancel out in the long run.
As for "actually, without a clock, how would you *ever* know that civil
time had changed?", if I am
accustomed to calling the time when the sun seems highest in the sky "12
hours", and I notice that
suddenly everyone starts calling the time when the sun seems highest in
the sky "9 hours" I will
certainly notice. Similarly, If I go to the next state to eat dinner and
notice most of the restaurants
have closed, I will suspect something funny is going on with the time.
Gerry Ashton
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