For example, Myanmar Time, or MTT, also uses GMT+5:30 and UTC+5:30. That being said, there are some countries using the same time offset of UTC+5:30. No, there is no other country using the same time zone as what India currently uses. Are there any other countries that use IST as well? It is worth noting that Bombay Time was Mumbai’s time zone, but the city’s name was changed from Bombay to Mumbai in the mid-1990s. There were, however, 3 time zones in India before the Second World War:īut since 1955, only IST remains. No, there is only one time zone in India in 2021. Is there more than one time zone in India?
By 1955, the Calcutta Time and Bombay Time zones had both given place to the Indian Time Zone.
Although IST has been India’s time zone for quite a while now, there were 2 cities with their own local times: Kolkata and Mumbai. In the year 1947, IST +5:30, which also translates to UTC +05:30 or GMT +05:30, was the new official public time for India. Since New Delhi (the capital city from India) is strangely placed in the middle between Pakistan (UTC +5:00) and Bangladesh (UTC +6:00), a time offset of 30 minutes was chosen when IST was created. Why is there a 30-minute offset with India Standard Time (IST)?Īs mentioned earlier, the 30-minute offset from India is mainly due to political tension from the past between New Delhi’s Union Government and Pakistan. From there, UTC almost took over the entire world, although a few countries and entities still use GMT. It was still using a 1-hour offset for each time zone, but, with its atomic clock process, time had never been so precise. Say hello to UTC, or Coordinated Universal Time! This new time system was not only independent of the sun, it gave the exact same time for everybody in the world. All that being said, what if there was a way to have a perfect clock that doesn’t need the sun’s position and that doesn’t need any Daylight Saving Time? By pulling back or moving time forward by 1 hour, this problem was no more. The little cumulative offsets through the year had a huge impact on the number of hours the sun was up in the sky before sunset. But not only that, since the rotation of the Earth is not a 100% perfect rotation, the results were not exactly the same during the year.īesides, this is the reason Daylight Saving Time had to be invented. This was problematic when the sky was cloudy. The first thing we need to take into account is this: while GMT was a revolutionary time system in its own right, it had to rely on the sun’s position when crossing the Prime Meridian (longitude 0 degrees). A few decades later, a new time zone system would change the way we use time forever. However, in the early 1900s, pre World War I, most common folks were familiar with the new way to determine time. Both were mostly used at the time by officials, scientists, and astronomers. From the time zone invention the Greenwich Mean Time, or GMT, was born. Within each equal part, an offset of 1 hour would be put in place so that when a cargo ship traverses from one time zone to the next, the crew could simply adjust their clocks accordingly. Sir Standford Fleming, a renowned astronomer at the time, had the idea to create a new time system, where the planet Earth would be divided into 24 equal parts. What’s the reason why time zones were created?ĭuring the 1700s, many transoceanic cargo travelers had a hard time with their clocks, it wasn’t clear yet that time zones were needed since the Earth was round and rotating around the sun. You’ll be surprised to learn that this particularity is mostly due to political tensions from the past and that since 1947, IST is the official Indian time zone. Instead, your smart device will show an increment of 30 minutes. As a matter of fact, it might even be confusing at first, since the Indian Standard Time (IST) timezone is not 1-hour off like most time zones in the world. When traveling to India, the first thing tourists often notice is their clock change.
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