Why to add extra 1 Hour to out Clocks

Hey fellows, i want to ask that why people are adding 1 hour extra to their clocks. Is Pakistan is adding or some one else ?.

there is already a thread for it http://www.wiredpakistan.com/forums/viewtopic.php?id=1050

and the reason is DST( day light saving time) read up on it

Read and continue:

http://www.wiredpakistan.com/forums/viewtopic.php?id=1050

Closing thread.