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This impacts timezone configuration (some RFC, right?)

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    The tzdata will need to be updated, that discussion is here:

    https://mm.icann.org/pipermail/tz/2015-August/022571.html

    I subscribe to the tzdata-announce mailing list, in part to keep abreast of releases, but also because the announcements make for wry humor. Historical data is often corrected and given how untimely such changes are they make for an entertaining read.