[tz] Issues with pre-1970 information in TZDB

[Howard Hinnant]

On Sep 22, 2021, at 7:02 PM, Tom Lane via tz <tz at iana.org> wrote:
> 
> (Of course, Windows would be the elephant in the room here, but last
> I heard Windows uses their own timezone database not tzdb.)

Windows now ships IANA data as part of their C++20 std::lib.  I believe they use ICU as the delivery vehicle, though that could change in the future.  This is in addition to their own timezone database for their OS API.

Howard