INDIAN STANDARD TIME (IST) is the time observed throughout
Indian Standard Time
* 1 History * 2 Criticism and proposals * 3 Time signals * 4 See also * 5 References * 6 External links
Main article: Time in
After independence in 1947 , the Indian government established IST as
the official time for the whole country, although
Daylight Saving Time (DST) was used briefly during the China–Indian War of 1962 and the Indo–Pakistani Wars of 1965 and 1971 .
CRITICISM AND PROPOSALS
The country's east–west distance of more than 2,933 kilometres
(1,822 mi) covers over 29 degrees of longitude, resulting in the sun
rising and setting almost two hours earlier on India's eastern border
than in the
Rann of Kutch
In the late 1980s, a team of researchers proposed separating the country into two or three time zones to conserve energy. The binary system that they suggested involved a return to British–era time zones; the recommendations were not adopted.
In 2001, the government established a four–member committee under the Ministry of Science and Technology to examine the need for multiple time zones and daylight saving. The findings of the committee, which were presented to Parliament in 2004 by the Minister for Science and Technology, Kapil Sibal , did not recommend changes to the unified system, stating that "the prime meridian was chosen with reference to a central station, and that the expanse of the Indian State was not large."
Though the government has consistently refused to split the country
into multiple time zones, provisions in labour laws such as the
Plantations Labour Act, 1951 allow the Central and State governments
to define and set the local time for a particular industrial area. In
The filmmaker Jahnu Barua has been campaigning for a separate time zone (daylight saving time) for the past 25 years. In 2010, he suggested creating a separate time zone for the Development of Northeastern Region.
In 2014, Chief Minister of
In June 2017, Department of Science and Technology (DST) indicated that they are once again studying feasibility of two time-zones for India. A proposal for both creating an additional Eastern India Timezone (EIT @ UTC+6:00) shifting default IST to UTC +5:00 and Day-light saving (IDT for IST and EID for EIT) starting on 14 April (Ambedkar Jayanti) and ending on 2 October (Gandhi Jayanti) was submitted to DST for consideration.
Official time signals are generated by the Time and Frequency
Standards Laboratory at the National Physical Laboratory in New Delhi,
for both commercial and official use. The signals are based on atomic
clocks and are synchronised with the worldwide system of clocks that
Coordinated Universal Time
Features of the Time and Frequency Standards Laboratory include:
* High frequency broadcast service operating at 10 MHz under call sign ATA to synchronise the user clock within a millisecond; * Indian National Satellite System satellite-based standard time and frequency broadcast service, which offers IST correct to ±10 microsecond and frequency calibration of up to ±10−10; and * Time and frequency calibrations made with the help of pico- and nanoseconds time interval frequency counters and phase recorders.
IST is taken as the standard time as it passes through almost the
centre of India. To communicate the exact time to the people, the
exact time is broadcast over the national All
Equation of time
* ^ "Military and Civilian Time Designations". Greenwich Mean Time. Retrieved 2006-12-02. * ^ "Two-timing India". Hindustan Times . 4 September 2007. Archived from the original on 9 May 2013. Retrieved 24 September 2012.
* ^ "Odds and Ends".
Indian Railways Fan Club . Retrieved
* ^ "