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<p>RFC 2822 is already obsolete, and this part was somewhat fixed in
RFC 5322. See Section 3.3 of that document, in that those old
zone names are marked as obsolete, but allowed. Pete can say more
if he wants.</p>
<p>Eliot<br>
</p>
<div class="moz-cite-prefix">On 03.03.23 00:04, Tim Parenti via tz
wrote:<br>
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cite="mid:CAFpi07xm9r6Z4SdvZU0ERD1xmEs4nC6-5tk+mzkF02n0whhjZw@mail.gmail.com">
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<div dir="ltr" class="gmail_attr"><br
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On Thu, 2 Mar 2023 at 17:45, Paul Eggert via tz <<a
href="mailto:tz@iana.org" moz-do-not-send="true"
class="moz-txt-link-freetext">tz@iana.org</a>> wrote:<br>
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<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">Whether the adjusted time
in (say) New York would be abbreviated "EST"<br>
or "AST" or "EDT" is up to common practice.</blockquote>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">[…]</blockquote>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">At some point "EST" might
become the<br>
best of the alternatives.</blockquote>
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<div>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:</div>
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EDT is semantically equivalent to -0400<br>
EST is semantically equivalent to -0500<br>
CDT is semantically equivalent to -0500<br>
CST is semantically equivalent to -0600<br>
MDT is semantically equivalent to -0600<br>
MST is semantically equivalent to -0700<br>
PDT is semantically equivalent to -0700<br>
<div>PST is semantically equivalent to -0800 </div>
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<div dir="ltr" class="gmail_signature">--<br>
Tim Parenti</div>
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