[tz] Question about leap seconds

[Steve Allen]

On Wed 2013-09-11T16:55:49 +0100, Zefram hath writ:
> Generalising a bit: it is sensible to represent a timezone's behaviour
> in a way that's independent of the local interpretation of time_t.
> Decoding time_t to a UTC time should be a separate step from converting
> a UTC time to local time.

Adding to that, the term UTC is polysemic in the context of computer
timekeeping.  I urge anyone using the term UTC to be explicit about
whether the intended meaning is UTC[ITU-R] (has leap seconds) or
UTC[POSIX] (no leap seconds).  This may help avoid misunderstandings.

--
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