+tzone 
+tz 
+tzone <offset>:<y|n>
This command tells the Mare which timezone you are in, so that all functions dealing with time will be adjusted according to where you live in real life. 
<offset> is the number of hours before or after Greenwich Mean Time, from 
-10 to 
13. Default offset for the Mare is usually 
-5, Eastern Standard Time. 
<y|n> refers to whether or not your timezone changes to Daylight Savings Time every 6 months. Default is 
Yes. 
Editor's note: This does not affect the time displayed in the weather command. -- 
SluggyQBFreak - 06 Feb 2005
From the winds.org Helptext - Courtesy Gandalf
-- 
SluggyQBFreak - 06 Feb 2005