IST Full Form

Introduction

IST refers to the Indian standard time which defines the standard time of a region or a country that is established by a law of the general usage as the civil time.  The time is observed throughout India and Sri Lanka using the time offset of UTC+05.30.  The longitude of 82° E meridian can be defined as the standard time of the entire country.  Indian standard time has passed through Mirzapur, Uttar Pradesh. IST has been the time zone that is observed throughout India.  India required multiple standard times as there were time differences of approximately 2 hours between the westernmost and easternmost portions of India.  There has been one time zone since 1947. After independence, the union government established the Indian standard time as the official time for India though India opted to observe daylight saving time.  

India requires multiple standard times 

After independence, there was a one-time zone in India which was calculated with the GMT or UTC. Greenwich Mean Time can be considered as the Universal coordinated time or UTC. The MUST have been calculated by the formula UTC +5.30. Due to the differences in time, India required more than one time zone. However, the time difference is 2 hours between the westernmost and easternmost parts of India. 

Indian Standard Time 

Indian standard time is also better known as the IST and it is defined as the time zone that is observed only in the Indian region. The time of the set of the IST is UTC+05:30 while it has been observed that in the case of Indians there is no specific daylight saving time observed. However, many other countries also have seasonal adjustments in their standard time while in Indian time there is no seasonal adjustment added. The union government established the IST after India’s independence in 1947 and still now IST is the official time for the whole of India. 

It has been observed that in the case of Kolkata and Mumbai, only they retained their own local times which are known as Calcutta time and Bombay time until the years 1948 and 1955 respectively. The Central observatory was located in Chennai after that it moved to the Shankargarh Fort in the district of Prayagraj. It is the reason the IST would be as close to UTC+05:30 as possible. Daylight saving time (DST) also was used in the two aspects such as in the year 1962 in the China-India war and also observed in the India-Pakistan war in the years 1965 and 1971. 

Indian Standard Time in the Indian map  

The IST is estimated on the basis of 82.5° E longitude which is the west part of the Mirzapur and almost near Allahabad which is the state of Uttar Pradesh. Approximately according to the Indian map the overall distance of the country covers almost 29 degrees of longitude. It clearly shows the difference of 2 hours between the sun rising between Indian eastern borders and the Rann of Kutch which is located in the far west. For the conservation of energy, many researchers in the 1980s proposed segmentation of the Indian time zone. This binary system which the scientist suggests closely resembles the British-era time zone and the recommendation of the segregation of the Indian time zone was dropped. However, in the year 2001 a team of scientists and technologists was conducted by the Indian government to identify the needs of the multiple time zones and also for understanding the daylight saving purpose. 

Time zone in India 

It has been observed that after the establishment of the time zone in India, there is a single time zone present in the Indian region. The initial phase of the Indian time zone has been observed since 1906 in India. However, India is one of the largest countries that stretch almost 3000 kilometers rather than 1864 miles from east to west. The difference between the Indian time zone and the New York time zone is approximately 10.30 times that of the respective country. The Indian time zone indicates Asia/Kolkata in the IANA time zone database. The time zone of India also aged five and half hours from the Coordinated Universal Time (UTC). The specialty of the Indian time zone is it only has one time zone whereas India spans two different geographical time zones. 

Conclusion 

The full form of IST is Indian standard time which means the 82° E meridian longitude. India has a one-time zone and has required more than one time zone as it has 2 hours differences between the eastern and western parts of India. IST passes through Mirzapur, in Uttar Pradesh which is near Allahabad.  IST is 5.30 hours ahead of GMT (Greenwich Mean Time) which is called the Universal coordinated time or UTC. Indian standard time is important as it helps to organize the schedule for transportation like railway and airways. IST also emphasizes productivity across India as it coordinates the economic activities of India.