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Line 3: '''Calcutta time''' was one of the two [[time zone]]s established in [[British India]] in 1884. It was established during the [[International Meridian Conference]] held at [[Washington, D.C.]] in the [[United States]]. It was decided that [[India]] had two time zones: Calcutta (now [[Kolkata]]) would use the [[90th meridian east]] and Bombay ([[Mumbai]]) the [[75th meridian east]]. Calcutta time was described as being 2423 minutes and 20 seconds ahead of [[Indian standard time]] and one hour, two minutes and ~~three~~20 ~~minutes~~seconds ahead of [[Bombay Time (time zone)\|Bombay standard time]] (UTC+5:5453:20).<ref>{{Cite journal\|title=Science, Notes and News\|journal=Science\|publisher=American Association for the Advancement of Science\|date=6 April 1906\|volume=23\|issue=588\|pages=560\|jstor=1631795\|doi=10.1126/science.23.588.558\|url=https://zenodo.org/record/1974994/files/article.pdf}}</ref> It has also been described as 32 minutes and 206 seconds ahead of [[Madras time]] ([[UTC+05:30\|UTC+5:53:20]]).<ref>{{Cite journal\|title=On the Introduction of a Standard Time for India\|journal=Proceedings of the Asiatic Society of Bengal\|publisher=Asiatic Society of Bengal\|location=Calcutta\|date=June 1899\|pages=62–66\|url=https://books.google.com/books?id=kIIbAQAAIAAJ&pg=PA63}}</ref> Even when [[Indian Standard Time]] (IST) was adopted on 1 January 1906, Calcutta time remained in effect until 1948 when it was abandoned in favour of IST.<ref name="Princely states">{{cite web\|url=http://www.irfca.org/faq/faq-misc.html \|title=Odds and Ends \|accessdate=2013-06-03 \|work=Indian Railways Fan Club}}</ref>

Calcutta Time: Difference between revisions