UTC+5:30 — for the entire country. From Kashmir in the far north to Kanyakumari at the southern tip， from Gujarat in the west to Arunachal Pradesh in the east， the time difference between India and those countries changes — but Indias clock stays put. This is worth knowing for anyone with standing weekly calls between India and North America or Europe. ， India uses a single timezone — India Standard Time (IST) ， the government chose the 82.5° East meridian as the reference point — roughly the geographic center of the country. That meridian corresponds to exactly UTC+5:30， placing local noon within 30 minutes of solar noon for most of the population. India does not observe Daylight Saving Time. IST is fixed at UTC+5:30 all year. The consequence for global scheduling: when the US springs forward in March or the UK switches to BST in late March， every Indian city and state runs on the same clock. The half-hour offset is intentional. When India adopted a unified national timezone in 1905 (and confirmed it in 1947 at independence)，。

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