March 2, 2023
11:04 p.m.
On Thu, 2 Mar 2023 at 17:45, Paul Eggert via tz <tz@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