These are the Daylight Savings Time Patches, as the DST is different this year in many countries.
(Please note, this only applies to to YDL 3 and 4, YDL 5 does not need
updates)
http://cvs.terraplex.com/~owen/tzdata-2007/RPMS
the yd3 package is for YDL 3.0.x, and the yd4 package is for YDL 4.x.x
To install the packages:
rpm -Uvh tzdata-2006g-1.yd3.noarch.rpm
-OR-
rpm -Uvh tzdata-2006g-1.yd4.noarch.rpm
You can confirm the update was successful with the following command:
/usr/sbin/zdump -v /etc/localtime | grep 2007
If the output of zdump does not show DST starting on March 11,
cp /usr/share/zoneinfo/US/<your timezone> /etc/localtime
In YDL 3.x you may have to log out and back in to KDE.