Kolkata uses Asia/Kolkata — UTC+05:30 (IST) in standard time. It is located in West Bengal, India. The live clock shows the current local time and updates every second.
Everything you need to know about Kolkata's time zone, UTC offset, and Daylight Saving Time schedule.
Kolkata uses UTC+05:30 in standard time. This is the offset used outside the daylight saving period.
This zone does not observe daylight saving time and stays on UTC+05:30 year-round.
The official IANA time zone name for Kolkata is Asia/Kolkata. This identifier is used in programming, operating systems and calendar applications worldwide.
No daylight saving transitions are scheduled for this zone.
Mumbai, Delhi, Bengaluru, Hyderabad, Chennai
Currency: Indian Rupee (INR). Calling code: +91. Languages: Hindi, English.
Kolkata, also known as Calcutta (its official name until 2001), is the capital and largest city of the Indian state of West Bengal. It lies on the eastern bank of the Hooghly River, 80 km (50 mi) west of the border with Bangladesh. It is the primary financial and commercial centre of eastern India and one of the gateways to northeastern India.
Kolkata is the seventh most populous city in India with an estimated city proper population of 4.5 million while its metropolitan region Kolkata Metropolitan Area is the third most populous metropolitan region of India with a metro population of over 15 million.
Kolkata is regarded by many sources as the cultural capital of India and a historically and culturally significant city in the historic region of Bengal.
The three villages that predated Calcutta were ruled by the Nawab of Bengal under Mughal suzerainty. After the Nawab granted the East India Company a trading license in 1690, the area was developed by the Company into Fort William.
Source: Wikipedia contributors — Kolkata. Adapted text is available under CC BY-SA 4.0; see licence details. Reviewed by the TimeZoria AI Editorial Team.
4,631,392 residents (GeoNames city population; metro areas may be larger).
West Bengal, India.
Asia/Kolkata · UTC+05:30 (IST).
No daylight saving time.
Indian Rupee (INR) · +91.
Dhaka, Chiang Mai, Hyderabad
Netaji Subhash Chandra Bose International Airport (CCU) about 13.4 km from the city coordinates. Source: OurAirports (public domain).
2024 averages: daily highs 30.9°C and lows 22.5°C. Warmest month: April (average high 38.1°C); coolest month: January (average low 13.0°C). Source: Open-Meteo (CC BY 4.0).
Kolkata is the commercial and financial hub of East and Northeast India and home to the Calcutta Stock Exchange. It is a major commercial and military port, and is one of five cities in eastern India (alongside Bhubaneswar, Guwahati, Imphal, and Kushinagar) to have an international airport. Source: Wikipedia contributors · CC BY-SA 4.0 (adapted).
Region: West Bengal · IANA zone: Asia/Kolkata · Open data sources and licence details: TimeZoria AI licenses.
Current time in major cities compared to Kolkata. Times update live every second.
Note on DST transitions: The offsets shown above reflect the current live offset, which changes twice a year due to Daylight Saving Time. Different regions change their clocks on different dates, which means the difference between Kolkata and another city can vary by 1 hour for a short period in spring and autumn. Always verify the exact time difference around DST transition dates for critical scheduling.
Ask any question about time, zones or conversions in natural language. The AI assistant will understand your query and provide a precise answer.
Ask: "What time is it in Madrid?" — The built-in assistant instantly provides the current time and offset without needing an API key.
AI knows over 600 IANA time zones and can answer questions about these zones.
Connect your own API keys (OpenAI, OpenRouter, Gemini, Anthropic, DeepSeek, Requesty) — full control.
Without an API key the module uses built-in zone logic — fast and delay-free.
Model is optional: leave it blank to use the provider default, or enter any model ID supported by the selected provider.
Kolkata's time zone affects business hours, travel plans and international calls. The Asia/Kolkata zone is used for local scheduling, transport and everyday life in West Bengal.
TimeZoria AI uses your browser's built-in Intl API and the IANA tz database to always display the correct Kolkata time — including DST changes — without any network requests.
Check the current time in other major cities — all on TimeZoria AI.
Common questions about Kolkata's time zone, UTC offset, and DST.