Indian Time Meridian


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Indian Time Meridian (IST)

Allahabad, India

The longitude against which Indian Standard time is set passes through Allahabad, India.

British India did not adopt the international standard time zones until 1905 when the meridian passing through Allahabad at 82.5 east (of Greenwich Meridian) longitude was picked as the central meridian for India, corresponding to a single time zone for the country at 5 hours and 30 minutes in advance of GMT.

This went into force on January 1, 1906. However, Calcutta time was officially maintained as a separate time zone until 1948. Bombay time was maintained but only informally until about 1955.

After independence and the partition of British India, Pakistan stayed on Indian Standard Time for three years and adopted Pakistan Standard Time at 5 hours in advance of GMT in 1951.

Map of Allahabad, India

A map of Allahābād, Uttar Pradesh, India. Click to see the map on MSN Maps & Directions

 

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Last revised: August 02, 2013 08:18 +0100 GMT Site Map

Indian Time Meridian