On 12/29/22 01:06, Eli Zaretskii wrote:
> Paul, any comments?  If not, I intend to install this on master.

It looks OK. I installed it on master for you, and am closing this bug 
report.

My only comment is that RFC 822 abbreviations like "EST" have been 
officially obsolete ever since RFC 2822 (2001) and are likely to become 
simply wrong if the US Congress changes EST to -0400 as it keeps 
threatening to do. Current email as a rule doesn't (and obviously 
shouldn't) use these obsolete abbreviations. Still, it's helpful to 
support them for reading old email archives.

I did a quick pass through Emacs master looking for places where it 
generates or encourages the use of obsolete or nonstandard time zone 
abbreviations, and installed the attached further patches on master to 
fix the issues I found.