Time ZonesThe time difference
Kathmandu is 15 minutes ahead of India all year. Neither place changes its clocks, so the difference never moves. India is always UTC+5:30, known as IST.
India time to Kathmandu time
Good hours to start a call (8 am to 9 pm in both places): from 8:00 am to 8:00 pm India time. Hours that start inside office time (9 am to 6 pm) in both: 9:00 am to 5:00 pm India time.
| India (IST) | Kathmandu |
|---|---|
| 12:00 am | 12:15 am |
| 1:00 am | 1:15 am |
| 2:00 am | 2:15 am |
| 3:00 am | 3:15 am |
| 4:00 am | 4:15 am |
| 5:00 am | 5:15 am |
| 6:00 am | 6:15 am |
| 7:00 am | 7:15 am |
| 8:00 am | 8:15 am |
| 9:00 am | 9:15 am |
| 10:00 am | 10:15 am |
| 11:00 am | 11:15 am |
| 12:00 pm | 12:15 pm |
| 1:00 pm | 1:15 pm |
| 2:00 pm | 2:15 pm |
| 3:00 pm | 3:15 pm |
| 4:00 pm | 4:15 pm |
| 5:00 pm | 5:15 pm |
| 6:00 pm | 6:15 pm |
| 7:00 pm | 7:15 pm |
| 8:00 pm | 8:15 pm |
| 9:00 pm | 9:15 pm |
| 10:00 pm | 10:15 pm |
| 11:00 pm | 11:15 pm |
Worked examples
All year. An office that closes at 6:00 pm in India closes when it is 6:15 pm in Kathmandu. A 9:00 am start in Kathmandu is 8:45 am in India, and its 6:00 pm finish is 5:45 pm in India. A message sent at 10:30 pm from India lands at 10:45 pm in Kathmandu.
When the date is different
Kathmandu is ahead of India, so for 15 minutes of every day the calendar date differs: from 11:45 pm India time until midnight, Kathmandu has already moved to the next day.
Why the gap is what it is
Indian Standard Time follows the sun at longitude 82.5° east. The zone that Kathmandu belongs to has its largest city, Kathmandu, at about 85.3° east. The sun crosses the sky between those two lines in about 11 minutes. Clock time rounds that to a tidy figure: 15 minutes. The two figures differ because every country picks a round offset that suits its whole territory, and some add summer time on top.
Rows marked in colour fall between 8 am and 9 pm in both places. Dates are from the IANA time zone database 2026f.
More
Read about time in Kathmandu or time in India. Other conversions from India: New York, Chicago, Denver, Los Angeles, Toronto, London, Paris, Berlin, Moscow, Dubai, Riyadh, Doha, Kuwait, Karachi, Dhaka, Colombo, Singapore, Kuala Lumpur, Bangkok, Hong Kong, Shanghai, Tokyo, Seoul, Sydney, Melbourne, Perth, Auckland, Johannesburg, Nairobi.