Timekeeping : India

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This is a collection of articles archived for the excellence of their content.

A brief history of (Indian) time

India Today.in , A Brief History of (Indian) Time “India Today” 13/2/2017

A Brief history of Indian Time

A Brief history of Indian Time

The concepts of standard time and Prime Meridian

Arjun Sengupta/ Madhya Pradesh CM’s claim about Ujjain and the Prime Meridian: a short history of measuring time/ December 23, 2023/ The Indian Express

The earliest postulation of standard time in the Indian context came from the 4th century CE Sanskrit treatise Surya Siddhanta. An incredible astronomical work for its time, rivalling Ptolemy’s 'Geographia ' from a few centuries earlier, it described a Prime Meridian passing through the cities of Rohitaka (modern-day Rohtak) and Avanti (modern-day Ujjain). Thus, in Indian astronomical traditions, Ujjain has always occupied a central position, with some modern scholars calling it India’s Greenwich (although Indian Standard Time is mentioned with respect to the observatory in Mirzapur).

In 1719, Sawai Raja Jai Singh of Jaipur built a famous observatory in the city, one of the five he built during his reign.