[tz] Cellphone tz updates often not happening in Israel

Guy Harris guy at alum.mit.edu
Mon Sep 23 22:33:43 UTC 2013

On Sep 23, 2013, at 1:32 PM, "L. David Baron" <dbaron at dbaron.org> wrote:

> Are there carriers in Israel that don't broadcast date and offset
> information from their cell towers?  Or were the carriers
> broadcasting incorrect data?

Is the software that supplies the NITZ information using the tzdb and, if so, does *it* have up-to-date versions of tzdata?

> http://en.wikipedia.org/wiki/NITZ doesn't have information on
> Israeli carriers, but it also suggests that there are substantial
> numbers of mobile networks that don't provide timezone information.

That article mentions Android and iOS - perhaps I should look a bit more at Bionic and Darwin to see if they has any provision for external overrides of the tzdb information.  (Or perhaps Android has two separate chunks of code that handle time zone, and some other chunk does that; as I remember, OS X shares the tzdb between the tzcode in libSystem and some high-level (probably non-open-source) frameworks, so I suspect iOS does the same, and those high-level frameworks may support those external overrides.)

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