Does India require multiple time zones?

Indian Standard Time is measured at Shankargarh Fort in Allahabad, (Uttar Pradesh) along the line of longitude 82.5° East. IST is 5 1/2 hours ahead of Greenwich Mean Time (GMT). This standard time zone is followed across India, even though the East to West expanse of India exceeds 2,900 km. Thus, when it is daylight in North-Eastern India it is not yet dawn in Western India, while when the sun sets in Western India it is night time in North-Eastern India. Therefore, there have been proposals by various people in the past that India needs more than one time zone.

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