Right time to call India (+91)
India runs on a single IST zone — 5.5 hours ahead of GMT and 10.5 ahead of New York. Knowing the best time to call India on +91 means catching Mumbai and Bengaluru inside the working day.
IST, at a glance.
See the live gap between a global reference city and India's single IST zone — no calculator needed.
India against the world's hubs.
Compare live India time against New York, London and Hong Kong so your call lands inside Indian office hours.
Understanding the time difference between the United States and India
Time zone differences across other major countries
Why timing matters for calls to India.
Reach an Indian desk mid-morning IST and you connect. Call during the West's afternoon and it's already night in Delhi.
The best windows to reach India.
Four factors that decide when an Indian prospect picks up — all anchored to the single IST business day.
India runs at +05:30
The zone is Asia/Kolkata. Every window on this page is worked out from that offset rather than a rule of thumb, so the times shown are the ones that actually apply to India.
No daylight saving
India stays on +05:30 all year. The windows below only move when the caller's own country changes its clocks, not when India does.
Shared hours with 3 of 5 markets
Callers in London, Mumbai, Sydney share part of the working day with India. The table above gives the exact intersection for each.
Where the gap is too wide
There is no 9-to-5 overlap with New York, Los Angeles. Calling India from those cities means someone is working outside normal hours — worth saying so when you book the call.
How to call India using the +91 code.
Four simple steps for every call into India — including the leading-zero rule on STD codes.
Number anatomy
Dial exit code
Press + on mobile or 00 from most landlines. This opens an international line.
Enter +91
India's international code. Every call to India must start with +91.
Area prefix
Add the local area or mobile network code — always drop any leading zero used for domestic calls.
Full number
Dial the remaining subscriber digits. Your number is now correctly formatted for international routing.
Best time to call — every country.
Jump to any country's best-time-to-call guide. Search by name, ISO or dial prefix.
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When your working day overlaps India
Callers in London, Mumbai and Sydney share part of the working day with India. There is no shared working window with New York and Los Angeles.
| Calling from | India is | Call at (your time) | Which is (their time) |
|---|---|---|---|
| New York | 10h 30m ahead | No shared working hours — you would need to call outside 9am-5pm | |
| Los Angeles | 13h 30m ahead | No shared working hours — you would need to call outside 9am-5pm | |
| London | 5h 30m ahead | 9:00 AM – 11:30 AM | 2:30 PM – 5:00 PM |
| Mumbai | same time | 9:00 AM – 5:00 PM | 9:00 AM – 5:00 PM |
| Sydney | 5h 30m behind | 2:30 PM – 5:00 PM | 9:00 AM – 11:30 AM |
Windows are the intersection of a 9am-5pm working day in each place, using India'sstandard-time offset of +05:30. India does not observe daylight saving, so these windows hold all year — though they shift when the caller's own country changes its clocks.
FAQ
Calling India, answered.
Time zone, daylight saving and dialling questions for India (+91).