Kolkata (Calcutta) · West Bengal · India
Current Time in Kolkata (Calcutta)
NTP-synced live clock · IST … — no daylight saving time · Weather, world clock comparison & complete city guide
UTC Offset…
DST Active…
vs. London…
Metro Population~15M
The current time in Kolkata (formerly Calcutta) is displayed live above, synchronised with international NTP servers.
Kolkata operates permanently on IST (India Standard Time, …)
— India is one of the few large countries in the world that never observes daylight saving time.
…
The IANA time zone identifier is Asia/Kolkata, used for the whole of India — the same zone for Kolkata, Mumbai, New Delhi and Chennai alike.
IST has a distinctive characteristic: its 30-minute offset from the full hour (UTC+5:30 rather than UTC+5 or UTC+6),
one of the most unusual time zone configurations in the world. Notably, Kolkata sits at 88°E longitude —
almost exactly on the reference meridian of IST (82°30'E) — so local solar time aligns unusually well with clock time.
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Kolkata Time vs. World Cities – Live Comparison
| City | Current Time | Time Zone | vs. Kolkata |
|---|---|---|---|
| 🇮🇳 Kolkata | … | … | ±0 |
| 🇬🇧 London | … | … | … |
| 🇺🇸 New York | … | … | … |
| 🇺🇸 Los Angeles | … | … | … |
| 🇩🇪 Berlin | … | … | … |
| 🇦🇪 Dubai | … | … | … |
| 🇸🇬 Singapore | … | … | … |
| 🇨🇳 Shanghai | … | … | … |
| 🇯🇵 Tokyo | … | … | … |
| 🇦🇺 Sydney | … | … | … |
| 🇺🇸 Chicago | … | … | … |
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India Standard Time (IST, UTC+5:30) – India's Single Fixed Time Zone
🚫 India never observes daylight saving time — IST (…) is identical every day of the year
🌐 Year-Round
IST — …
India Standard Time
Stable 365 days a year
IANA time zone:
Stable 365 days a year
IANA time zone:
Asia/Kolkata
⌟ Half-Hour Offset
UTC+5:30
Kolkata lies at 88°E — close to the IST reference meridian (82°30'E). India is one of the few nations using a 30-minute UTC offset, a geographic compromise covering a subcontinent spanning ~30° of longitude
💡 Why does India use UTC+5:30 and never change its clocks? India spans roughly 30° of longitude (from ~68°E to ~97°E) — a width that would theoretically require two separate time zones. At independence in 1947, a single national time zone, UTC+5:30, was chosen as a symbol of unity. The 30-minute offset had already existed under British rule since 1906, introduced by the East India Company as a geographic midpoint. India briefly used DST during WWII (1942) and the 1962 and 1965 wars, but permanently abandoned it thereafter. Current difference from London: … — UK winter (GMT, UTC+0): +5h 30min; UK summer (BST, UTC+1): +4h 30min.
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Kolkata Time Zone Converter – Compare with World Cities
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Kolkata (IST)
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Kolkata – Geography & Location Facts
LocationSouth AsiaGangetic Plain · Eastern bank of the Hooghly River · State of West Bengal
GPS Coordinates22.5726°N88.3639°E · Ganges delta · close to the Bay of Bengal
Average Elevation~9 m avg.Predominantly flat terrain in the Ganges delta; vulnerable to cyclones and flooding
Area206 km²City proper area; Kolkata Metropolitan Area covers ~1,886 km²
ClimateAw (Köppen)Tropical savanna — hot, humid monsoon summers (Jun–Sep); mild, dry winters (15–27°C Dec–Feb)
RiverHooghly (Ganges)Western distributary of the Ganges delta; the historic artery of Kolkata's commercial prosperity
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Population & Administrative Facts
| City Population | ~5.1 million (2024) |
| Metropolitan Population | ~15.3 million |
| Density | ~25,000 inhabitants/km² |
| Main Languages | Bengali (official), Hindi, English, Urdu |
| Federal State | West Bengal |
| Phone Code | +91 (India) · +91-33 (Kolkata) |
| India Internet Domain | .in |
| Currency | Indian Rupee (INR, ₹) |
| Traffic | Drives on the left 🚗 |
| Country ISO Code | IN (India) |
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A Brief History of Kolkata
- pre-1690The area of modern Kolkata comprised three fishing villages — Sutanuti, Gobindapur and Kalikata — inhabited by Bengali fishermen and craftsmen under successive Mughal rule. Kalikata (possibly from the goddess Kali or from kilkila, meaning flat land) gives the city its name. The region was considered commercially secondary to the major Bay of Bengal trading ports.
- 1690–1757Job Charnock, agent of the British East India Company, establishes a trading post on the Hooghly in 1690 — traditionally regarded as Calcutta's founding date. Fort William is built in 1696 and becomes the British administrative nucleus. The city grows rapidly as an export hub for textiles, spices and opium, attracting French and Dutch competitors along the Bengal coast.
- 1757–1911The Battle of Plassey (1757) establishes British supremacy in Bengal. Calcutta becomes the capital of British India — the most important administrative, economic and cultural centre in colonial Asia. The Victoria Memorial, University of Calcutta (1857), the Indian Museum (Asia's oldest, 1814), and the Gothic-style High Court are built during this era. The city becomes a crucible of the Bengal Renaissance: Rabindranath Tagore (Nobel Prize for Literature, 1913), Ram Mohan Roy and others make Calcutta the intellectual capital of Asia.
- 1911–1947The capital of British India is transferred to New Delhi in 1911, reducing Calcutta's political primacy while its cultural and industrial weight remains undiminished. The independence movement finds fertile ground here: Subhas Chandra Bose (Netaji), among the most charismatic anti-colonial leaders, is a native son. The Partition of India in 1947 brings waves of refugees from what becomes East Pakistan (later Bangladesh), reshaping the city's demographic and social fabric.
- 1971–presentThe 1971 Bangladesh Liberation War floods the city with millions of refugees, creating enormous demographic and economic strain. Kolkata enters a period of relative industrial decline marked by labour unrest. Officially renamed Kolkata in 2001 (reverting to the Bengali spelling), the city experiences a gradual renaissance through IT, services and cultural tourism. Durga Puja — declared UNESCO Intangible Cultural Heritage in 2021 — consolidates Kolkata's global identity as the Cultural Capital of India, attracting millions of visitors every October.
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Top Attractions in Kolkata
🏛️
Victoria MemorialThe grand white marble monument built between 1906 and 1921 in honour of Queen Victoria is Kolkata's most recognisable landmark. Set at the southern end of the Maidan, the memorial houses 25 galleries with 28,394 artefacts documenting the history of the British Empire and the Bengal Renaissance. Illuminated at night, the reflection of the white marble in the surrounding lake makes it one of the most spectacular sights in India.
🌺
Kalighat TempleOne of the 51 shakti pitha (sacred Hindu sites), Kalighat Temple has origins far predating its 19th-century structure — the city's very name is thought to derive from this temple dedicated to the goddess Kali. Thousands of pilgrims visit daily; ritual animal sacrifices continue according to ancient tradition. The adjacent Kumartuli district is home to craftsmen who create the iconic clay idols for the Durga Puja festival. Photography is restricted; respectful dress is required.
🌐
Howrah Bridge (Rabindra Setu)Opened in 1943, Howrah Bridge is a 705 m cantilever span connecting Kolkata with Howrah across the Hooghly, with no central pylon — among the longest such bridges in the world at its completion. Over 100,000 vehicles and 150,000 pedestrians use it daily, making it one of the busiest bridges on earth. At sunset, with yellow trams, ferryboats and an orange sky over the Hooghly, the scene is among the most photographed in all of Asia.
📚
Tagore's House (Jorasanko Thakur Bari)The ancestral home of the Tagore family in Jorasanko, where Rabindranath Tagore (1861–1941) was born and died — the first non-European Nobel Laureate in Literature (1913). Now housing the Rabindra Bharati University and Museum, the complex holds galleries of manuscripts, paintings, musical instruments and photographs. The inner courtyard remains a living centre of Bengali culture. Essential for anyone wishing to understand the intellectual soul of Kolkata.
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The Maidan & Fort WilliamThe Maidan is Kolkata's vast green lung — a 3.5 km² park at the heart of the city, used daily for cricket, football, yoga, kite-flying and political rallies. Surrounded by Eden Gardens (India's largest cricket stadium), the racecourse and the walls of Fort William (active Army headquarters; civilian access restricted), the Maidan is where the social pulse of the city is felt most vividly, especially at dusk when families and vendors fill the paths along the Hooghly.
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Trams & Colonial Dalhousie QuarterKolkata is the only Indian city still running trams — Asia's first tram network (1880), today a cherished anachronism. The BBD Bagh (former Dalhousie Square) quarter concentrates the Victorian colonial buildings that served as the nerve centre of the British Empire: the General Post Office (1868), the Writers' Building and East India Company offices. A walk through BBD Bagh, Strand Road and the Tiretti Bazaar Chinatown (one of the oldest Chinese communities in India) is a living history lesson.
✈️ Airports Serving Kolkata
| Airport | IATA | Distance | Transfer | Notes |
|---|---|---|---|---|
| Netaji Subhas Chandra Bose International Airport | CCU | ~17 km north of city centre | ~40–60 min (taxi/Ola/Uber); ~35 min (Kolkata Metro Orange Line, opened 2024) | ✈️ Main hub; direct international flights to Bangkok, Singapore, Dubai, Kuala Lumpur, Dhaka, Kathmandu; hub for Air India, IndiGo, SpiceJet |
| Bagdogra Airport | IXB | ~630 km north | ~1h 15min (domestic flight) | 🛫️ Gateway to Darjeeling and Sikkim; popular short break combined with Kolkata visit |
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Kolkata Cuisine & Bengali Specialities
Hilsa & Chingri Malai CurryHilsa (ilish) is the sacred fish of Bengalis — a migratory sea fish that travels up rivers to spawn, with rich, oily, intensely flavoured flesh. Cooked in mustard paste (ilish bhapa), lightly fried or in tomato-based sauces, hilsa is the pride of Bengali cuisine and a deeply resonant cultural symbol. Chingri Malai Curry — king prawns in a creamy coconut milk sauce with turmeric and chilli — represents Bengali culinary elegance, present at every wedding and festival feast.
Rosogolla & Mishti DoiKolkata is the world capital of milk-based sweets. Rosogolla — spongy balls of fresh cheese (chhena) simmered in sugar syrup scented with cardamom and rose water — is the most iconic Indian sweet, invented in Kolkata in 1868 by Nobin Chandra Das. Mishti Doi (sweetened yoghurt fermented with jaggery in earthen pots) is the standard dessert after any Bengali meal. Sandesh, Pantua and Lyangcha complete a world of dairy-based confectionery unmatched anywhere in India.
Kati Roll & Street FoodKati Roll — invented at Kolkata's Nizam's restaurant in Park Street in 1932 — is a paratha flatbread coated in beaten egg, wrapped around tandoori meat (chicken, mutton, egg), onions, chutney and lime. It conquered all of India and the global Indian diaspora. Kolkata street food also includes Puchka (the local version of pani puri, with tamarind water), Ghugni (yellow pea curry) and Jhalmuri (puffed rice with mustard oil and chilli) — all available on every street for 10–30 INR.
Dal & Shorshe BataBengali home cooking is distinguished by its masterful use of mustard: shorshe bata (freshly ground white and black mustard paste) flavours almost every sauce — fish, vegetables or meat. Bengali dal (lentil or chickpea soup, tempered with ghee, turmeric, asafoetida and panch phoron — the five-spice Bengali blend) is more delicate and aromatic than northern versions. Shukto — a bitter mixed vegetable appetiser with mustard seeds — traditionally opens the Bengali meal to cleanse the palate.
College Street CafésThe College Street area (Boi Para — Book Town) hosts the largest concentration of second-hand bookshops in Asia alongside the legendary Indian Coffee House (open since 1942) — the meeting place of Tagore, Satyajit Ray, Mrinal Sen and generations of writers, revolutionaries and philosophers. White-uniformed waiters in red turbans serve filter coffee and toast amid the din of debate about politics, literature and cinema — an atmosphere unique in Asia.
Kolkata-Style BiryaniKolkata biryani is distinct from all other Indian variants: it contains potato (an innovation by the cooks of Nawab Wajid Ali Shah of Lucknow, exiled to Kolkata in 1856, who substituted expensive meat with potato), has a delicate saffron and kewra aroma, and uses more fragrant, less spiced rice than the Hyderabadi version. Arsalan, Aminia and Royal Indian Hotel are the benchmark local institutions. A plate of biryani with raita is an obligatory Kolkata culinary experience.
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Practical Travel Information for Kolkata
| 🚫 Visa | Most nationalities require a visa for India. The simplest option is the India e-Visa (online application, 2–4 days processing, ~$25 USD), available at indianvisaonline.gov.in. A tourist e-Visa allows stays of up to 90 days. Always verify current requirements before travel. |
| ✈️ Getting There | No direct flights from most European capitals to Kolkata. Main connections: Dubai (Emirates, ~12h total), Doha (Qatar Airways, ~11h), Bangkok (Thai Airways / AirAsia, ~14h), Kuala Lumpur (AirAsia, ~15h), Singapore (Singapore Airlines). Kolkata's CCU airport has direct international routes to Dubai, Bangkok, Singapore, Dhaka and Kathmandu. |
| 💰 Currency & Payments | Indian Rupee (INR, ₹). 1 USD ≈ 83–85 INR; 1 EUR ≈ 88–92 INR (check live rates). VISA/Mastercard accepted at mid-to-upper-range hotels and restaurants. Cash required for street food, rickshaws and markets. ATMs widely available; withdrawal fee typically ~3%. |
| 🔌 Electricity | 230V, 50Hz; Type D sockets (three round pins in a triangle) and Type C (two round pins). Most countries outside South Asia require a plug adapter. Universal adapters available cheaply at airports and hotels. |
| 📱 SIM Cards | Local SIMs (Airtel, Jio, Vi) available at the airport and shops with your passport and a photo. 4G data at very low cost (~$5–10 USD / 30 days unlimited). Activation may take 24–48 hours for foreign nationals. |
| 🚇 Local Transport | Kolkata has India's oldest metro system (Kolkata Metro, since 1984), with 6 lines including the new Orange Line airport link (2024). Iconic yellow trams (unique in India) still run on heritage routes. Hand-pulled rickshaws survive in the old city. Ola and Uber work reliably. Ferries across the Hooghly are an essential experience. |
| 🌡️ Best Time to Visit | October–February: best season — temperatures 15–28°C, low humidity, clear skies. October brings the spectacular Durga Puja festival — unmissable but very crowded. March–May: hot and humid, 30–40°C. June–September: monsoon season — intense rain and extreme humidity; Kolkata receives more rainfall than Mumbai. |
| ⚠️ Health | Drink only bottled or filtered water. Recommended vaccinations: Hepatitis A, typhoid. Malaria risk is low in the metropolitan area but higher in rural West Bengal. Travel health insurance is essential. Kolkata has excellent private hospitals (Apollo, Fortis, AMRI). |
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Frequently Asked Questions about Kolkata Time
Kolkata uses IST – India Standard Time, with an offset of UTC+5:30 (5 hours and 30 minutes ahead of UTC), permanently, all year round. The IANA identifier is
Asia/Kolkata, used for the whole of India (there is no separate Asia/Calcutta zone). India does not observe daylight saving time (DST) — the time zone is stable 365 days a year. Kolkata's position at 88°E longitude means its local solar time aligns closely with IST, unlike western India where the clock runs significantly ahead of the sun.
Kolkata is always ahead of London. UK Winter (GMT, UTC+0): Kolkata (IST, UTC+5:30) is 5 hours and 30 minutes ahead. British Summer Time (BST, UTC+1): Kolkata is 4 hours and 30 minutes ahead. Example: London 09:00 GMT = Kolkata 14:30 IST. London 09:00 BST = Kolkata 13:30 IST. Since India never changes its clocks, all variation comes from the UK's transitions to BST (last Sunday in March) and back (last Sunday in October).
Kolkata is always ahead of New York. US Winter (EST, UTC−5): Kolkata (IST, UTC+5:30) is 10 hours and 30 minutes ahead. US Summer (EDT, UTC−4): Kolkata is 9 hours and 30 minutes ahead. Example: New York 09:00 EST = Kolkata 19:30 IST. This large gap means real-time collaboration typically requires one side to work outside standard business hours — early morning New York corresponds to evening in Kolkata.
Yes. Kolkata and Mumbai are on the same time zone: IST (UTC+5:30). All of India operates on a single time zone identified as
Asia/Kolkata in the IANA database. There is no time difference between Kolkata, Mumbai, New Delhi, Chennai, Bangalore, Hyderabad or any other Indian city. India is one of the few large countries that chose to maintain a single time zone for national unity, even though this means the sun rises and sets at significantly different clock times across its eastern and western extremities.
The 4:30–5:30 hour gap (Kolkata ahead of Western Europe) creates a workable overlap. UK Winter (GMT, Kolkata +5:30h): London 08:00 GMT = Kolkata 13:30 IST — excellent for both sides. London 09:00 GMT = Kolkata 14:30 IST. British Summer Time (BST, Kolkata +4:30h): London 09:00 BST = Kolkata 13:30 IST. For Central Europe (CET/CEST): Kolkata is +4:30h ahead in winter (CET, UTC+1) and +3:30h ahead in summer (CEST, UTC+2). Berlin 09:00 CET = Kolkata 13:30 IST; Berlin 09:00 CEST = Kolkata 12:30 IST. The optimal scheduling window is Europe 08:00–11:00 = Kolkata 11:30–15:30 IST. Avoid setting Kolkata morning meetings (09:00 IST) as that is 04:30–05:30 European time — impractical for European teams.
Kolkata is always ahead of Los Angeles. US Winter (PST, UTC−8): Kolkata (IST, UTC+5:30) is 13 hours and 30 minutes ahead. US Summer (PDT, UTC−7): Kolkata is 12 hours and 30 minutes ahead. Example: Los Angeles 08:00 PST = Kolkata 21:30 IST. This large gap makes real-time collaboration very difficult — any overlap requires one side to work early morning or late evening.
The IANA identifier
Asia/Kolkata replaced the former Asia/Calcutta after the Indian government officially renamed the city from Calcutta to Kolkata in 2001, reverting to the original Bengali spelling. The IANA Olson database (used by all modern operating systems) updated the identifier to reflect the official renaming. Both identifiers refer to the same time zone (UTC+5:30), but Asia/Kolkata is the current canonical form. The zone applies to all of India, not just Kolkata — it is the national IST identifier.
Kolkata is served by Netaji Subhas Chandra Bose International Airport (CCU), ~17 km north of the city centre. It has direct international connections to Dubai, Bangkok, Singapore, Kuala Lumpur, Dhaka (Bangladesh) and Kathmandu (Nepal). The most efficient routes from Europe go via Dubai (Emirates) or Doha (Qatar Airways), with a total journey time of approximately 12–14 hours. Since 2024, Kolkata Metro's Orange Line provides a direct rail link to the airport, significantly reducing transfer time and cost.
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