[LEAPSECS] Leap smear

[Doug Calvert]

On Tue, Sep 20, 2011 at 3:11 AM, Ian Batten <igb at batten.eu.org> 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?