Explanation

• Greenwich Mean Time (GMT) is based on the mean solar time at the Royal Observatory in Greenwich, London, UK.
• The Greenwich Meridian (0° longitude) passes through Greenwich.
• The international system of standard time zones was established at the International Meridian Conference in 1884.

Last verified on 08-10-2026

Explanation

• Standard Meridian of Pakistan: 75° E
• Time Zone: Pakistan Standard Time (PST)
• Difference from UTC: +5 hours
• Reference point: Greenwich Meridian (0° longitude)
• Total longitudes on Earth: 360° (180° East + 180° West)

Last verified on 28-06-2026

Explanation

• Greenwich is an area in south-east London, England.
• It lies on the south bank of the River Thames in the historic county of Kent.
• It is famous for the Prime Meridian (0° longitude).
• It is used as the reference for Greenwich Mean Time (GMT).
• It is famous for calculating the time for all countries.

The Greenwich meridian, also known as the prime meridian, passes through the following countries:

• England
• France
• Spain
• Algeria
• Mali
• Burkina Faso
• Togo
• Ghana 
• Antarctica

Last verified on 31-03-2026

Explanation

• Pakistan Standard Time (PST) is 5 hours ahead of Greenwich Mean Time (GMT).
• Suggested by Professor Muhammad Anwar in 1951.
• GMT is the standard time of Greenwich, UK, used as a reference worldwide.
• Example: When it is 12:00 noon GMT, it is 5:00 PM in Pakistan.

Last verified on 17-03-2026

Explanation

• Pakistan Standard Time (PST) is UTC +5 hours.
• Uzbekistan also follows UTC +5.
• So their standard time matches Pakistan’s exactly.

Additional information:

• India – UTC +5:30 (30 minutes ahead)
• China – UTC +8 (3 hours ahead)
• Nepal – UTC +5:45 (45 minutes ahead)

Last verified on 19-03-2026