Good Evening
Real-time IST clock for all of India — the same time in Mumbai, Delhi, Bangalore, Chennai, Hyderabad, Kolkata and every Indian city.
All Indian cities share the same IST (UTC+5:30). These live clocks update every second — IST is the same everywhere in India.
India Standard Time (IST, UTC+5:30) compared to every major world timezone — live, updating every second.
| City / Country | Current Time | IST Difference | Timezone |
|---|
Everything you need to know about India's unique UTC+5:30 timezone — history, usage, business hours, and global comparisons.
India Standard Time (IST) is the single timezone used across the entirety of India, Sri Lanka, and parts of Nepal. IST is UTC+5:30 — that is, 5 hours and 30 minutes ahead of Coordinated Universal Time. The 30-minute offset makes IST one of the world's few half-hour timezones. IST was officially adopted on January 1, 1906, based on the 82.5°E longitude meridian running through Mirzapur, Uttar Pradesh — roughly the geographic center of India longitudinally.
India spans approximately 2,933 km from east to west, covering 30 degrees of longitude (68°E to 97°E). Logically, this span warrants 2-3 time zones. However, after independence in 1947, India chose a single unified timezone for: 1) National unity — preventing fragmentation, 2) Simplified administration for a newly formed democratic republic, 3) Unified railway timetables across 64,000+ km of tracks, 4) Common financial market timing for BSE/NSE. The debate continues, but IST (UTC+5:30) remains a national identity symbol.
IST's +5:30 offset is globally unique. Very few countries use half-hour offsets: India (+5:30), Sri Lanka (+5:30), Afghanistan (+4:30), Iran (+3:30), Myanmar (+6:30), Nepal (+5:45 — 15-minute!). India's 30-minute offset means that when it's noon in London (GMT), it's 5:30 PM in India — not an even 5 or 6 hours. This creates interesting scheduling dynamics, as meeting times always involve half-hour conversions from India to Western timezones.
India does NOT observe Daylight Saving Time (DST). While countries like USA, UK, Europe, and Australia shift their clocks forward/backward seasonally, India's IST remains permanently at UTC+5:30 year-round. This consistency means: (1) India's time difference from USA changes by 1 hour twice a year (when the US shifts), (2) India's difference from UK changes similarly, (3) Business teams globally must account for this when scheduling India calls during US DST transitions in March and November.
Standard India business hours: Monday to Friday, 9:00 AM to 6:00 PM IST. Government offices: 9:00–5:30 PM IST. Banks: 10:00 AM–4:00 PM IST. Stock markets (BSE/NSE): 9:15 AM–3:30 PM IST. IT companies: 9:00 AM–7:00 PM IST (day shift); 5:30 PM–2:30 AM IST (US shift). Retail: 10:00 AM–10:00 PM IST (malls). Restaurants: 12:00 PM–11:00 PM IST. Courts: 10:30 AM–4:30 PM IST.
IST (UTC+5:30) differences from major world cities: London (GMT/BST): −5:30 (−4:30 BST). New York (EST/EDT): −10:30 (−9:30 EDT). Los Angeles (PST/PDT): −13:30 (−12:30 PDT). Dubai (GST): −2:30. Singapore (SGT): +2:30. Tokyo (JST): +3:30. Sydney (AEDT): +5:30. Beijing (CST): +2:30. Frankfurt (CET): −4:30. Paris (CET): −4:30. Moscow (MSK): −2:30. São Paulo (BRT): −8:30.
India's $250+ billion IT industry is built around IST. The "India advantage" in IT outsourcing: When US teams finish work at 6 PM EST (= 4:30 AM IST), overnight work is done by India's day team (9 AM IST = 10:30 PM previous night EST). This 24-hour development cycle — sometimes called "follow the sun" — is enabled precisely by IST's relationship to Western timezones. India's IT capital Bangalore (IST) has a unique 10.5-hour difference from New York and a 13.5-hour difference from San Francisco — creating minimal overlap but maximizing "hand-off" efficiency.
IST occupies a uniquely strategic position in global time. It sits midway between European timezone (GMT) and Asian Pacific timezones (UTC+8 to UTC+12). For global businesses, India at IST can bridge European morning hours (9 AM London = 2:30 PM IST) with Asian business closings (5 PM Singapore = 2:30 PM IST). India is also 12 hours behind itself when compared to Hawaii (UTC-10), making India and Hawaii practical "anti-podal" business partners for 24/7 coverage models.
Live countdowns to India's most celebrated festivals — all timestamped in IST.