Pakistan Standard Time
The current Pakistan time (PKT) became effective at midnight between 30 April and 1 May, 1954. Before this, PKT was the same as British-ruled Calcutta local time (Indian standard time or IST), which came into use on 1 January 1906, and was also used by Sri Lanka (then Ceylon) until the independence of Pakistan on 14 August 1947. Pakistan Standard Time is Taken From a Village "Masroor" of Tehsil Shakargarh and District Narowal.
Daylight saving time
Daylight saving time is no longer observed in Pakistan. 
- PKT is taken from Shakargarh
- Gap analysis on Energy Efficiency institutional arrangements in Pakistan, Asif Masood, pp.44, 2010, UN ESCAP (Economic and Social Commission for Asia and the Pacific), United Nations, ... In 2002, Pakistan introduced Daylight Savings Time (DST) ... met with public controversy and resistance was discontinued the same year. During the energy crisis of 2007-2008, the Government once again announced DST during summer season. It was implemented for almost two years before it was discontinued in 2010 because of the same public controversy and resistance ...