[tz] Fractional seconds in zic input
eggert at cs.ucla.edu
Mon Feb 5 18:41:30 UTC 2018
On 02/05/2018 09:34 AM, John Hawkinson wrote:
> Regardless of whether it was labelled "experimental" or "mainline" or "development," the fact is that it is the source from which releases are cut.
Yes, as tz-link.html says, the GitHub repository is a development
repository. Its latest version is always intended to be suitable for
release on pretty much a moment's notice (since governments often don't
give us much notice); this was true even when the GitHub repository was
None of the recently-installed changes were intended to depart from this
procedure. The only changes since 2018c that affect the data are
relatively routine: they are a 1-day correction to Kiribati's
change-of-day in 1994/5, and a 1-second correction to Jamaica etc.
before 1913. In the code there is also a porting fix for macOS awk that
to my mind is the most-important change that would prompt a new release.
Although other recently-installed changes are significant, they are
important only for future releases, not for the current development code
or data as used by current downstream packages.
Although we could change tzdata in the future, these are changes that
haven't been installed into the development version, or even proposed in
detail as patches. If and when they are made, they should be accompanied
by a procedure that continues to generate data in the current format, a
draft of which is in the repository now.
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