See TimeZoneDatabase on SqueakMap, and on the sqwiki at
<http://minnow.cc.gatech.edu/squeak/1076>. You can use this to obtain
the offsets from GMT for any time zone. It also includes a plugin for
Unix/Linux that gets the information from the underlying operating
system. There are also several flavors of time and date formatting on
Squeak Map. Todd Blanchard has added ISO 8601 time and date formatting
and timestamps to TimeZoneDatabase, registered on Squeak Map as
TimeZoneDBWithTimeStamp. Brent Pinkney has done the Chronology classes
package on Squeak Map, which handles date and time formatting. And I
think that Richard Harmon's ANSI compatibility package on SqueakMap
also does this.
Dave