Hearkening back to the resolution of 3/16/2022 versus 16/3/2022 with 2022-03-16: EPT, CPT, MPT, and PPT (where the middle P stands for permanent).

An option: a middle Y for "year-round."

The option with the most fun: a middle A for "all the," yielding four three-letter words as time zone abbreviations.

@dashdashado

On Wed, Mar 16, 2022, 10:40 AM Paul Eggert via tz <tz@iana.org> wrote:

On 3/15/22 23:26, Ephraim Silverberg via tz wrote:
> Another option would be to just delete the middle letter and use two-letter
> abbreviations -- e.g. EST/EDT -> ET

As I understand it, POSIX and Internet RFC 8536 both require at least
three characters in time zone abbreviations. Of course the standards
could be changed, but the corresponding software would need to be
changed too.