Those who are using NTP server in Fedora Core – 3 in Bangladesh might find this topic help full. I searched the Net for tzdata update for FC3 but no luck. Then I just Update tzdata on a CentOS 5.1 system and just Imported the Zone File. The zone file you can download from Dhaka_DST_New. Just rename it from Dhaka_DST_New.doc to Dhaka_DST_New

Copy it to your NTP System. Then Take a backup of your current zone file “cp /usr/share/zoneinfo/Asia/Dhaka /root/Dhaka_Old” then copy the New filw to that location “cp Dhaka_DST_New /usr/share/zoneinfo/Asia/Dhaka”. Now pls chk if have a soft link or file in /etc/localtime

ls -l /etc/ | grep localtime
lrwxrwxrwx    1 root root      30 Jun 20 14:48 localtime -> /usr/share/zoneinfo/Asia/Dhaka

If it is a link then your done else remove the file “rm -rf /etc/localtime” and create a soft link “ln -fs /usr/share/zoneinfo/Asia/Dhaka /etc/localtime”. I got it working like this ….. Hope this will help someone…