[tz] VTIMEZONEs and Outlook

Martin Burnicki martin.burnicki at meinberg.de
Wed Jul 10 07:26:52 UTC 2019

Ken Murchison wrote:
> All,
> Sorry for the off-topic post, but I'm fishing.
> I'm one of the maintainers of vzic, a utility to convert IANA tzdata
> into iCalendar VTIMEZONE components.  In the process of tweaking the
> tool to handle recent tzdata changes and to generate more
> correct/compact VTIMEZONEs in "pure" mode, I managed to break the
> generation of Outlook-compatible VTIMEZONEs.

Just an idea: Is it possible that the conversion started to fail for
newer TZDB versions which support switching time *back* for DST, and
have a 25 hour number in some rule(s)?

Can the "rearguard" versions of TZDB still be converted?

See the discussions in

Martin Burnicki

Senior Software Engineer

MEINBERG Funkuhren GmbH & Co. KG
Email: martin.burnicki at meinberg.de
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