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Necessity of ‘two time zones: IST-I (UTC + 5 : 30 h) and IST-II (UTC + 6 : 30 h)’ in India and its implementation

A strong demand of a separate time zone by northeast populace has been a matter of great debate for a very long period. However, no implementable solution to this genuine problem has yet been proposed. The CSIR-National Physical Laboratory, CSIR-NPL (the National Measurement Institute, NMI, of India and custodian of Indian Standard Time, IST) proposes an implementable solution that puts the country in two time zones: (i) IST-I (UTC + 5 : 30 h, represented by longitude passing through 82°33′E) covering the regions falling between longitude 68°7′E and 89°52′E and (ii) IST-II (UTC + 6 : 30 h, represented by longitude passing through 97°30′E) encompassing the regions between 89°52′E and 97°25′E.

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