Alist of zoneinfo-style time zones and places for `display-time-world'.
Each element has the form (TIMEZONE LABEL).
TIMEZONE should be a string of the form AREA/LOCATION, where AREA is
the name of a region -- a continent or ocean, and LOCATION is the name
of a specific location, e.g., a city, within that region.
LABEL is a string to display as the label of that TIMEZONE's time.