The correct answer is GMT+5.
Pakistan Standard Time (PKT) is the time zone used throughout Pakistan. It is officially 5 hours ahead of Greenwich Mean Time (GMT) and Coordinated Universal Time (UTC).
Understanding the Offset:
- Time zones are calculated based on their distance from the Prime Meridian ($0^\circ$ longitude) in Greenwich, London.
- The Calculation: For every $15^\circ$ of longitude east of the Prime Meridian, the time increases by one hour. Pakistan is geographically positioned such that its standard time is centered around $75^\circ$ East longitude ($15 \times 5 = 75$).
Adoption: Pakistan officially adopted this time zone on September 15, 1951. Before this, the region followed Indian Standard Time (IST), which is GMT+5:30.
Key Features of PKT:
- No Daylight Saving: Pakistan currently does not observe Daylight Saving Time (DST). While it has been implemented occasionally in the past to save energy (most recently in 2008 and 2009), the country maintains a consistent GMT+5 offset year-round.
- Reference Point: The standard time is specifically calculated at Pasrur, a city near Sialkot, though the offset applies to the entire country from Karachi to Gilgit.
Comparison of the Options:
- GMT+2: Used by many Eastern European and African countries (e.g., Egypt, South Africa).
- GMT+5: The correct answer for Pakistan, shared with countries like Uzbekistan and parts of Russia.
- GMT+6: Used by Bangladesh and Bhutan; it is one hour ahead of Pakistan.
- GMT+9: Used by Japan and South Korea; it is four hours ahead of Pakistan.
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