On 20 Sep 2011, at 2011, Doug Calvert wrote:

> On Tue, Sep 20, 2011 at 3:11 AM, Ian Batten <[email protected]> wrote:
>> Civil time changes by an hour every six months.  The idea that timezones 
>> will have
>> to change by an hour in a thousand years' time isn't going to frighten 
>> anyone.
>> 
> 
> I apologize for my ignorance. What does "civil time changes by an hour
> every six months" mean?

Daylight saving.

ian
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