There's nothing to add really. I don't want to memorize TZ abbreviations - it makes no sense. Reproducible: Always
Just change it in applet settings, it applies to both tooltip and the applet.
Would it be possible to customize how to "name" a city? As a lot of people are now working remotely, I would like to name a "timezone" "Peter", or "Martin", as I would easily forget in which city/timezone each team member lives.