--- a/.emacs-my	Sun Mar 13 14:17:11 2016 +0200
+++ b/.emacs-my	Thu Mar 17 15:59:35 2016 +0200
@@ -419,9 +419,9 @@
 ;; For (display-time-world).
 (setq display-time-world-time-format "%A %d %B %R %z %Z")
 (mapc (lambda (el) (add-to-list 'display-time-world-list el))
-      '(("EET" "EET")
-        ("EST" "EST")
-        ("PST" "PST")))
+      '(("EET" "UTC+2, Eastern European Time")
+        ("EST" "UTC-5, Eastern Standard Time, New York")
+        ("EDT" "UTC-4, Eastern Daylight Time, New York")))
 
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 (message "shell, bash, Cygwin, MSYS")