Is there a different single letter per time zone band? That’s almost elegant if so (as long as you ignore the many places with idiosyncratic time zones).
But seriously, in DST world, the numerical offsets (-6, ...) are confusing enough, adding yet another "simpler" notation would only increase confusion.
I did say almost elegant...! I just hadn't noticed before that the 26 Roman letters are just enough for 24 hour-wide timezones, which seems like a nice coincidence, so I wondered if anyone had tried it. There are way more than 24 different zones in practice, of course.
Unfortunately, there's too many timezones for just A-Z, but nautical time does make an attempt.
See https://en.wikipedia.org/wiki/List_of_UTC_offsets for the funny markings they decided to use when they ran out of letters.
