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Indian Standard Time (IST), sometimes also called India Standard Time, is the time zone observed throughout India, with a time offset of UTC+05:30. India does not observe daylight saving time or other seasonal adjustments. In military and aviation time IST is designated E* (“Echo-Star”). It is indicated as Asia/Kolkata in the IANA time zone database. Check the current time in India

India Time History

History From 1854 to 1914, the Indian government set its clocks to British Summer Time (BST) and then to British Standard Time (BST). From 1914 to 1936, the Indian government set its clocks to British Standard Time (BST), the same time as most of the British Empire. From 1936 to 1950, the Indian government set its clocks to Central European Time (CET), which was one hour ahead of British Standard Time (BST). From 1950 to 1970, the Indian government set its clocks to Eastern European Time (EET), which was two hours ahead of British Standard Time (BST).

From 1970 to 1991, the Indian government set its clocks to Indian Standard Time (IST), which was three hours ahead of British Standard Time (BST). From 1991 to 2002, the Indian government set its clocks to Bangladesh Standard Time (BST), which was four hours ahead of British Standard Time (BST). From 2002 to 2005, the Indian government set its clocks to Bangladesh Standard Time (BST) and South East Asia Standard Time (SEAST), which was five hours ahead of British Standard Time (BST). From 2005 to 2008, the Indian government set its clocks to Bangladesh Standard Time (BST) and North-East Asia Standard Time (NEAST), which was six hours ahead of British Standard Time (BST). From 2008 to 2014, the Indian government set its clocks to India Standard Time (IST), which was seven hours ahead of British Standard Time (BST). From 2014 to 2015, the Indian government set its clocks to India Standard Time (IST), which was eight hours ahead of British Standard Time (BST). Since 2015 the Indian government has set its clocks to Indian Standard Time (IST).

Indian Standard Time calculation 

Indian Standard Time is calculated from the clock tower in Mirzapur nearly exactly on the reference longitude of IST at 82°30’E, within 4 angular minutes. In 1905, the meridian passing east of Allahabad was declared as a standard time zone for British India and was declared as IST in 1947 for the dominion of India. The longitude of 82°5’E passing through Naini near Allahabad was chosen as the standard meridian for the whole country, because there is a time lag of more than a hour between western India (around +05:00) and northeastern India (around +06:00), hence approximately standardizing with UTC+05:30 of central India. Currently, the Council of Scientific and Industrial Research- National Physical Laboratory (CSIR-NPL) maintains the Indian Standard Time with the help of the Allahabad Observatory.

The following table shows the differences between IST and UTC+05:30 (IST as of 2014.. See also Hindu calendar Indian Summer Time Hijri date Indian Time International Dateline International Fixed Calendar Indian Standard Time List of countries by UTC offset Notes References Further reading External links NITI Aayog – National Institute for Transforming India Category:Time in India Category:Indian Standard TimeSemiconductor devices are commonly found in modern electronic products. Semiconductor devices vary in the number and density of electrical components. Discrete semiconductor devices generally contain one type of electrical component, e.g., light-emitting diode (LED), small signal transistor, resistor, capacitor, inductor, and power metal oxide semiconductor field effect transistor (MOSFET). Integrated semiconductor devices typically contain hundreds to millions of electrical components. Examples of integrated semiconductor devices include microcontrollers, microprocessors, charged-coupled devices (CCDs), solar cells, and digital micro-mirror devices (DMDs). Semiconductor devices perform a wide range of functions such as signal processing, high-speed calculations, transmitting and receiving electromagnetic signals, controlling electronic devices, transforming sunlight to electricity, and creating visual projections for television displays. Semiconductor devices are found in the fields of entertainment, communications, power conversion, networks, computers, and consumer products. Semiconductor devices are also found in military applications, aviation, automotive, industrial controllers, and office equipment. Semiconductor devices exploit the electrical properties of semiconductor materials. The structure of semiconductor material allows its electrical conductivity to be manipulated by the application of an electric field or base current or through the process of doping. Doping introduces impurities into the semiconductor material to manipulate and control the conductivity of the semiconductor device. A semiconductor device contains active and passive electrical structures.

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