Below are Timezone update instructions for Slackware and any generic Linux 
install. Because of the changes in Daylight Savings Time in the USA ad Canada 
in 2007, it becomes necessary to update your system's timezone info if you are 
using a Linux distro that was released before 2006 and have not updated it.

SLACKWARE 10.2:
cd /
wget ftp://ftp.slackware.com/pub/slackware/slackware-10.2/patches/packages/glibc-zoneinfo-2.3.5-noarch-7_slack10.2.tgz
gunzip glibc-zoneinfo-2.3.5-noarch-7_slack10.2.tgz
tar xvf glibc-zoneinfo-2.3.5-noarch-7_slack10.2.tar
chmod 0777 install/doinst.sh
./install/doinst.sh
date


SLACKWARE 10.1:
cd /
ncftpget ftp://ftp.slackware.com/pub/slackware/slackware-10.1/patches/packages/glibc-zoneinfo-2.3.4-noarch-2_slack10.1.tgz
gunzip glibc-zoneinfo-2.3.4-noarch-2_slack10.1.tgz
tar xvf glibc-zoneinfo-2.3.4-noarch-2_slack10.1.tar
chmod 0777 install/doinst.sh
./install/doinst.sh
date


SLACKWARE 10.0:
cd /
ncftpget ftp://ftp.slackware.com/pub/slackware/slackware-10.0/patches/packages/glibc-zoneinfo-2.3.2-noarch-7_slack10.0.tgz
gunzip glibc-zoneinfo-2.3.2-noarch-7_slack10.0.tgz
tar xvf glibc-zoneinfo-2.3.2-noarch-7_slack10.0.tar
chmod 0777 install/doinst.sh
./install/doinst.sh
date


GENERIC LINUX TIMEZONE CHANGES(Example New York EST):
cd /tmp
ncftpget ftp://elsie.nci.nih.gov/pub/tzdata2007c.tar.gz
gunzip tzdata2007c.tar.gz
tar xvf tzdata2007c.tar
zic -d /tmp/zoneinfo northamerica
cp -f /tmp/zoneinfo/EST5EDT /usr/share/zoneinfo/
cp -f /tmp/zoneinfo/America/New_York /usr/share/zoneinfo/America/
zdump -v /usr/share/zoneinfo/EST5EDT | grep 2007
zdump -v /usr/share/zoneinfo/America/New_York | grep 2007
ln -fs /etc/localtime /usr/share/zoneinfo/EST5EDT
zdump -v /etc/localtime | grep 2007
date