![]() ![]() In 1802, India received a cohesive time zone when a British astronomer of the East India Company named John Goldingham established the longitude along Chennai as 13★′24″N, 80☁8′30″E. Local kings used their own Hindu calendars to measure time. According to a report in, these time measurements were mostly used for astrological calculations and not actual timekeeping. This was further divided into smaller time units. The book Surya Siddhanta, dating back to the fourth century CE, states that in ancient India a 24-hour day started with the sunrise at the prime meridian that passed through Ujjain. Kolkata’s time was set at five hours and 30 minutes before GMT while Mumbai’s time zone was set at four hours and 51 minutes ahead of GMT.īy 1905, however, the meridian passing east of Allahabad was chosen as the standard time for the entire country and was eventually declared the Indian Standard Time in 1947. Two time zones were created in the cities of Kolkata and Mumbai in 1884. This is when the need for a unified time zone became more pressing than ever. Pre-independent India operated on local time zones until the railway system was established in the country in the 1850s. The difference in longitude between Mirzapur in India and the Royal Observatory in Greenwich in London equals a time difference of exactly five hours and 30 minutes. IST is calculated from the 82.5 degrees East longitude, which falls on a clock tower in Mirzapur near Allahabad, Uttar Pradesh. ![]() It is ahead of Greenwich Mean Time (GMT) by five and a half hours. Indian Standard Time is the official time zone of India. As IST completes its 75 years of operation, let’s take a closer look at how it came into being. ![]()
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |