[tz] [tz-announce] 2018f release of tz code and data available
eggert at cs.ucla.edu
Mon Oct 22 06:50:56 UTC 2018
Michael H Deckers via tz wrote:
> time-of-day values on or after 24 hours may be ambiguous due
> to leap seconds.
Only if we decide they're ambiguous. Instead, let's resolve the ambiguity in the
obvious and useful way.
> The fictitious UTC time stamp "2016-12-31T25Z" could
> indeed be taken to mean
> 2016-12-31T00Z + 25 h = 2017-01-01T00:59:59Z or else
> 2017-01-01T00Z + 01 h = 2017-01-01T00:00:00Z.
Only the latter meaning is useful in tzdb, so let's do it that way. We went
through this issue a while ago with "rolling" versus "stationary" leap seconds,
only one of which is useful in practice, and in hindsight we should have
supported only the useful variant.
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