Current IST Time (India Standard Time)
India Standard Time is 14:21:59 on Saturday, September 19, 2026. IST is UTC+5:30 every day of the year — India has no daylight saving time, so this offset never moves.
Jump to: Which IST?· Converter· The 5:30 offset· One zone, one country· No daylight saving· Working with IST· FAQ
Saturday, September 19, 2026
14:21:59
IST (UTC+5:30)
India Standard Time and Your Local Time
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Your Local Time
14:21:59
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India Standard Time Converter
Pick any Indian time — a meeting, a market open, a call — and read it off in your own zone and other major cities. For any other pair of zones, use the full time zone converter.
- Your local time
- —
- London
- 9:51 AM
- Berlin
- 10:51 AM
- Dubai
- 12:51 PM
- Singapore
- 4:51 PM
- Tokyo
- 5:51 PM
- New York (Eastern)
- 4:51 AM
- Chicago (Central)
- 3:51 AM
- Los Angeles (Pacific)
- 1:51 AM
Three Countries Use "IST"
India is what almost everyone means — but Ireland and Israel both have a legitimate claim to the abbreviation.
Almost always this one
India Standard Time
14:21
Sat, Sep 19
- Offset
- UTC+5:30 all year
- Where
- All of India — New Delhi, Mumbai, Bengaluru, Kolkata, Chennai
- Daylight saving
- No — India has not used daylight saving since 1971
- Population
- ~1.4 billion
Also called IST
Irish Standard Time
09:51
Sat, Sep 19
- Offset
- UTC+1 in summer, UTC+0 in winter
- Where
- Republic of Ireland — Dublin, Cork, Galway
- Daylight saving
- Inverted — see below. Ireland defines summer as standard.
- Population
- ~5 million
Also called IST
Israel Standard Time
11:51
Sat, Sep 19
- Offset
- UTC+2 in winter, UTC+3 in summer
- Where
- Israel — Jerusalem, Tel Aviv
- Daylight saving
- Yes — IST in winter, IDT in summer
- Population
- ~10 million
Ireland's legal inversion is genuinely unusual
Every other country defines winter as standard time and summer as a departure from it. Ireland does the opposite. Under the Standard Time (Amendment) Act 1971, Irish Standard Time is UTC+1 — the summer offset — and the winter period is written into law as a deviation from that standard. The clocks end up reading exactly the same as the UK's all year; only the legal description is reversed. It is a piece of statutory tidying from Ireland's brief 1968–71 experiment with year-round summer time that was never unwound.
Why India Is Half an Hour Off
IST is anchored to the 82.5° E meridian, which runs near Mirzapur in Uttar Pradesh. Earth turns 15 degrees an hour, so 82.5 degrees is exactly five and a half hours — hence UTC+5:30, and hence the half hour that catches out every scheduling tool that assumes whole numbers.
The choice was a compromise. India spans roughly 28 degrees of longitude, from Gujarat in the west to Arunachal Pradesh in the east. A whole-hour offset would have had to sit at 75° E (UTC+5) or 90° E (UTC+6), and either would have pushed one end of the country badly out of step with its own daylight. Splitting the difference at 82.5° E put the national clock closest to the middle. The standard was adopted in 1906, and India kept it after independence in 1947.
India is not alone. Several zones run on half or quarter hours, and they exist for the same reason — a country whose useful longitude does not land conveniently on a whole-hour line.
| Offset | Where |
|---|---|
| UTC+5:30 | India, Sri Lanka |
| UTC+5:45 | Nepal — the only 45-minute offset in Asia |
| UTC+4:30 | Afghanistan |
| UTC+3:30 | Iran |
| UTC+6:30 | Myanmar, Cocos Islands |
| UTC+9:30 | Central Australia — Adelaide, Darwin |
| UTC+12:45 | Chatham Islands, New Zealand |
| UTC-3:30 | Newfoundland, Canada |
Half-hour offsets are a recurring bug class
A great deal of software still stores time-zone offsets as whole hours, or formats them as ±HH without minutes. India is by far the largest population that breaks those assumptions, so IST is usually where the bug is first reported — and Nepal at UTC+5:45 then breaks the fix. If you are storing offsets rather than IANA identifiers, this is the case that proves you should not be. Our Unix timestamp converter shows IST alongside UTC for checking values by hand.
One Clock for 2,900 Kilometres
India runs a single official time zone across a country wide enough to justify two. The result is a real and visible gap in daylight between its ends: the sun rises in Arunachal Pradesh roughly two hours before it rises in Gujarat, but both start the working day on the same clock. In the northeast that can mean sunrise before 5:00 AM and darkness by 4:30 PM in winter, with offices still keeping standard national hours.
Assam's tea industry solved the problem informally and a long time ago. Plantations there have worked for over a century on "chai bagan" time — tea garden time — one hour ahead of IST, so that field labour tracks the actual daylight rather than the national clock. It is not an official zone, but it is a working one, used daily by a substantial industry.
Proposals for a second official zone recur. In 2018 researchers at the CSIR National Physical Laboratory, which maintains India's official time, published a case for a separate UTC+6:30 zone for the northeastern states, arguing for meaningful energy savings and better alignment of working hours with daylight. The counter-arguments are consistent: the risk of confusion on railways and in aviation, and the symbolic weight of a single national time. No change has been adopted.
India Does Not Change Its Clocks
IST has been a fixed UTC+5:30 since 1971. Daylight saving has only ever been used in India as a wartime measure — briefly during the conflicts of 1962, 1965 and 1971 — and never in peacetime.
The reason is latitude. Daylight saving pays off where summer and winter days differ sharply in length, which is why it is a northern European and North American habit. Much of India lies between 8° and 30° N, where the variation across the year is modest and the gain from shifting the clock is correspondingly small. The National Physical Laboratory has examined the question repeatedly and concluded each time that it is not worth the disruption.
For anyone scheduling with India, this has a useful consequence and a trap. The useful part: India's offset is one of the few in the world you can memorise once and rely on. The trap: the gap between India and your own country still changes twice a year if you observe daylight saving. A recurring call that works all winter will be an hour off every spring — and it will be your clocks that moved, not India's.
Working Across IST
| Zone | Their winter | Their summer | Practical overlap |
|---|---|---|---|
| New York | 10.5 hours behind IST | 9.5 hours behind IST | 6:30 PM – 9:30 PM IST is 9:00 AM – 12:00 PM in New York |
| Chicago | 11.5 hours behind | 10.5 hours behind | 7:30 PM – 10:30 PM IST covers the Chicago morning |
| Los Angeles | 13.5 hours behind | 12.5 hours behind | 9:30 PM IST is 9:00 AM in California |
| London | 5.5 hours behind | 4.5 hours behind | 2:30 PM – 6:30 PM IST overlaps the full London morning |
| Berlin | 4.5 hours behind | 3.5 hours behind | Comfortable overlap all afternoon IST |
Europe is the easy one; California is not
India and Western Europe share a genuinely comfortable window — the Indian afternoon is the European morning, giving three or four overlapping working hours without anyone staying late. The US East Coast gets a narrow evening slot. California, at twelve and a half hours' distance, has essentially none: 9:00 AM in Los Angeles is 9:30 PM in Bengaluru, which is why teams spanning those two zones tend to run asynchronously and reserve live calls for a fixed weekly slot that someone has agreed to take outside their own hours.
India Standard Time FAQ
What is the current IST time?
India Standard Time is currently 14:21:59 on Saturday, September 19, 2026. IST is UTC+5:30 every day of the year — India does not observe daylight saving time, so this offset never changes.
What does IST stand for?
Most often India Standard Time (UTC+5:30). It is also the official abbreviation for Irish Standard Time (UTC+1) and Israel Standard Time (UTC+2). India dominates the usage by population by a wide margin, but all three are correct in their own countries.
Why is India half an hour off from everyone else?
IST is set to the 82.5° E meridian, which passes near Mirzapur in Uttar Pradesh. That longitude is exactly five and a half hours of Earth rotation east of Greenwich. It was chosen as a compromise for a country spanning roughly 28 degrees of longitude: a whole-hour offset at 75° E or 90° E would have suited one side of India considerably worse than the other.
Does India use daylight saving time?
No. India has had no daylight saving since 1971. It was used only briefly during the wars of 1962, 1965 and 1971. Proposals to introduce it resurface periodically and are consistently rejected — the seasonal variation in day length is small at India's latitudes, so there is little to gain.
How far ahead is IST from EST?
India is 10.5 hours ahead of EST and 9.5 hours ahead of EDT. The gap changes twice a year not because India moves, but because the United States does. The same applies to every other country India works with that observes daylight saving.
Does India have more than one time zone?
Officially no — a single clock covers the whole country, from Gujarat to Arunachal Pradesh. Because India spans about 2,900 km east to west, the sun rises roughly two hours earlier in the northeast than in the far west. Assam's tea industry has long kept an unofficial working clock one hour ahead of IST, known as "chai bagan" or tea garden time, and the case for a second official zone is argued periodically without being adopted.
Why is Irish Standard Time defined so strangely?
Ireland is the one country that inverts the usual arrangement. Under the Standard Time (Amendment) Act 1971, Irish Standard Time is UTC+1 — the summer time — and the winter period is legally defined as a deviation from it, rather than the other way round. The clocks land in the same place as the UK's, but the legal framing is reversed: Ireland has a winter time exception, not a summer time one.
What is IST in UTC?
IST is UTC+5:30. To convert, add five and a half hours to UTC: 09:00 UTC is 14:30 IST. Going the other way, subtract — 18:00 IST is 12:30 UTC.
Which time zone identifier should I use for India?
Asia/Kolkata. You may also see the older alias Asia/Calcutta, which still resolves correctly in most systems. Do not use a bare "IST" string — it is ambiguous between three countries, and a system that resolves it to Ireland or Israel will be several hours off.
Why do half-hour offsets cause software bugs?
Because a surprising amount of code assumes offsets are whole hours — storing them as an integer number of hours, or formatting them as ±HH without minutes. India is the largest population affected, so IST is where those assumptions usually surface first. Nepal at UTC+5:45 breaks the same code a second time, in a way that is harder to notice.