[tz] Tzdb and the Sunshine Protection Act

[Tim Parenti]

On Thu, 2 Mar 2023 at 17:45, Paul Eggert via tz <tz at iana.org> wrote:

> Whether the adjusted time in (say) New York would be abbreviated "EST"
> or "AST" or "EDT" is up to common practice.

[…]

At some point "EST" might become the
> best of the alternatives.


Worth considering that, if "EST" were to become standard for -04, it would
require modifications to supported, but obsoleted, formats in RFC 2822
§4.3, which state:

EDT is semantically equivalent to -0400
EST is semantically equivalent to -0500
CDT is semantically equivalent to -0500
CST is semantically equivalent to -0600
MDT is semantically equivalent to -0600
MST is semantically equivalent to -0700
PDT is semantically equivalent to -0700
PST is semantically equivalent to -0800

--
Tim Parenti
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