Re: TZ ignored by (display-time)

[Jason Rumney <jasonr@f2s.com>]

> (display-time) fails to take the contents of TZ into effect when
> formatting the time string.


The problem seems to be caused by the new display-time-world 
functionality, so this bug shouldn't affect Emacs 22.

When time.el is loaded, the following code clobbers the internal 
timezone setting:

(defcustom display-time-world-list

  ;; Determine if zoneinfo style timezones are supported by testing that

  ;; America/New York and Europe/London return different timezones.

  (let (gmt nyt)

    (set-time-zone-rule "America/New York")

    (setq nyt (format-time-string "%z"))

    (set-time-zone-rule "Europe/London")

    (setq gmt (format-time-string "%z"))

    (set-time-zone-rule nil)




According to the documentation for set-time-zone-rule, it should set the 
timezone back to the local timezone when the argument is nil. But it 
doesn't seem to take note of the TZ environment variable when it does this.