Hi,

Thanks for the question!  No, this change should not change the signature at the beginning of the file.  My understanding is that it should only impact application provided parsers that read the time zone data files and expect the SAVE/DST values to only be positive. 

Thanks,
Patsy

On Tue, May 22, 2018 at 10:49 AM, Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl> wrote:
On Tue, May 22, 2018 at 04:24:05PM +0200, Jan Kurik wrote:
> = Proposed System Wide Change: The tzdata transition to 'vanguard' format =
> https://fedoraproject.org/wiki/Changes/TZDATA-VANGUARD

Hi,

does the new format change the magic at the beginning of the file?
In systemd upstream we recently added a verification step that checks
that timezone files set with 'timedatectl set-timezone ...' have the right
signature [1]. If it changes, we'll have to adjust that commit.

[1] https://github.com/systemd/systemd/commit/a2932d5116

Zbyszek
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