On 22/03/2023 17:37, David Woolley wrote:
I wonder if this could be the result of an embargo, implemented by
either Iran on the USA? At least for open source software, the latter
should not be an issue, as it can be obtained from other countries.
Looking at
<https://techcommunity.microsoft.com/t5/daylight-saving-time-time-zone/bg-p/DSTBlog>
it would appear that Microsoft haven't acknowledged the existence of the
change, which may explain the problem with PCs, as Microsoft operating
systems reportedly dominate.
I think this may, in part, be because they are not permitted to provide
the Windows Update service to Iran, although I found it difficult to
find the exact current position with respect to that. They may also be
ignoring official Iranian government communications, or the government
may not have tried to communicate (the IANA update seems to have been
triggered by a private individual).
It seems to me that the government could have anticipated this and
provided guidance (e.g. to disable DST, or even registry patches to
manually correct the information - although not as easy to modify as the
IANA data, it looks to me that the Dynamic DST registry entries are
fairly straightforward).
Microsoft also prefer a lead time of at least a year, for such changes,
although I believe there would still have been interim change notices on
the above blog page, if they had accepted the existence of the change.
I haven't found a similar page for Apple.
In case the point is getting lost, none of this relates to NTP, which,
like GPS, etc., does not have time zones.
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