Time zone changes from version 2006c1 to 2006c2:
Date : Thursday April 13, 2006 13:00 CDT
File : 2006c2.txt

As I mentioned in version 2006b2.txt, Sri Lanka is changing
from GMT+6 to GMT+5.5 like India, on the 13.th. of April 
at midnight (local time), or 14.th. of April at 0:00 setting 
the clock half an hour back. When the shareware version of
WTE 2.0 is released, it will have a new file format where
this kind of change is easy to handle, you can specify at
any time in the future (years ahead, if necessary) when a
specific place announces GMT offset change.

Regards, Jesper Nørgaard Welen

GMT = Greenwich Mean Time
DST = Daylight Saving Time
WTE = World Time Explorer

World Time Explorer 1.8:
http://www.worldtimeexplorer.com/index.html
e-mail: support@worldtimeexplorer.com
this text: http://www.worldtimeexplorer.com/2006c2.txt
... see also http://www.worldtimeexplorer.com/2006c1.txt

TZ Database:
http://www.twinsun.com/tz/tz-link.htm
ftp://elsie.nci.nih.gov/pub