The Gardens Keep Their Own Hour
India runs one time zone across nearly thirty degrees of longitude, so the sun is up over Arunachal Pradesh while Gujarat is still nearly two hours from dawn. Assam's tea estates have quietly kept their own clock, one hour ahead, since the British planted them — and the proposal to make that official was rejected on strategic grounds.
Work in an Assam tea garden starts at eight in the morning and stops at four in the afternoon, and both of those times are a lie by exactly sixty minutes. The estate clock is an hour ahead of the clock in the town down the road. Nobody in the garden calls this a time zone; they call it bagan time, or chaibagan time, garden time, and it has been running since the British planters set it up in the nineteenth century to get their labour into the leaf before the light was wasted. It has no legal existence whatsoever.
It exists because of an arithmetic problem the Indian state has decided repeatedly not to solve. India runs on one time zone. Indian Standard Time is UTC+5:30, fixed to the meridian at 82°30' east, which passes near Mirzapur in Uttar Pradesh. The country extends from about 68°7' east in Gujarat to about 97°25' east in Arunachal Pradesh. That is a little over twenty-nine degrees of longitude, or very nearly two hours of solar time, governed by a single clock.
One meridian, two thousand kilometres
The single zone is not ancient. Indian Standard Time was adopted on 1 January 1906, under the British, and it did not immediately replace what the big cities were already using: Calcutta kept its own time, twenty-three minutes and twenty seconds ahead of IST, until 1948, and Bombay held on to a clock thirty-nine minutes behind it until 1955. The country arrived at one clock late, and by then the argument for it was national rather than astronomical. A railway network, a broadcast schedule and an army are easier to run on one number.
What a garden clock is for
The cost of that decision is not shared evenly. In the far east of Assam the sun can be up before half past four in June and gone by half past four in December. An office that opens at ten on IST in Dibrugarh has already burned five and a half hours of daylight; a school day that ends at four in December lets out with about twenty minutes of light left in it. A tea estate could not absorb that, because plucking has to happen in the light and the leaf has to reach the factory the same day, so the planters simply moved the clock. It is the cheapest available fix — you do not have to legislate a time zone to run one, you only have to agree with your neighbours what the numbers mean — and the fact that it has survived a century and a half of Indian administration says something about how well it works.
A time zone is not a fact about the sun. It is an agreement about what to call the hour, and Assam has been quietly keeping a different agreement in its own fields since before the Indian state existed.
The proposal
In 2018 researchers at the CSIR-National Physical Laboratory in Delhi — which is the institution that actually keeps Indian Standard Time — published a worked plan for two zones. IST-I would stay at UTC+5:30, running from 68°7' east to a boundary at 89°52' east. IST-II would sit at UTC+6:30 and cover everything past it: Assam, Meghalaya, Nagaland, Arunachal Pradesh, Manipur, Mizoram, Tripura and the Andaman and Nicobar Islands. The line was not drawn for tidiness. It was chosen to sit in the narrow corridor of land between Bangladesh and Nepal — the Siliguri gap — where a change of zone crosses the fewest people, and it was justified by circadian arguments about matching office hours to daylight, and by the electricity that lighting the evening in the east currently costs.
Why it has not happened
It was not a new idea. Members of parliament from the north-east had been asking for a separate zone since at least the early 2000s, and in 2014 the chief minister of Assam, Tarun Gogoi, said publicly that the state was prepared to run its clocks an hour ahead on its own account — that is, to make bagan time official for everybody. Asked about the proposal in the Lok Sabha in December 2018, the science and technology minister replied that a high-level committee had already considered two zones and not recommended them, citing strategic considerations and the cost to the railways and other utilities. The railway objection is the concrete one and it deserves to be taken seriously: Indian Railways runs on IST across the whole network, and a boundary at Siliguri would put a change of hour in the middle of every timetable heading east, at exactly the point where the network is narrowest and least redundant. The strategic argument is less inspectable, which is what "strategic" usually means, but the shape of it is not hard to guess in a region that borders four countries.
What an hour is worth
India is not alone in this. China runs Beijing time across a landmass that would comfortably hold five zones, and Xinjiang keeps an unofficial local clock two hours behind it in much the way Assam keeps one an hour ahead. Nepal, next door, holds out at UTC+5:45, a forty-five-minute offset maintained partly because it is not India's. A national clock has always carried an argument about who the nation is centred on, and the people who live an hour east of that centre are the ones who notice.
For a traveller it is a small and specific thing. You will not find bagan time on a timetable, a booking or a departure board — every train, flight and ferry in Assam runs on IST, and assuming otherwise will strand you. You will find it in when people eat, when the shutters go up in a small town, and how strange it feels to watch the light go out of the sky at four in the afternoon while the working day has two hours left in it. The garden clock is the correct answer to where the sun actually is. It has simply never been allowed to say so out loud.