Keep the half-hour in Indian Standard Time
Mumbai uses Indian Standard Time, UTC+5:30, throughout the year under current rules. The thirty-minute component matters: rounding to UTC+5 or UTC+6 introduces a half-hour error. The IANA identifier Asia/Kolkata represents the same time used in Mumbai.
Delhi and Bengaluru follow the same national clock. London and New York change their clocks seasonally, so the difference from Mumbai varies while India's time remains fixed. Use the dated examples below as a starting point, then convert the actual appointment.
Upcoming clock changes in Mumbai
No clock change is scheduled in the next 12 months according to the time-zone rules available when this page was opened. Other cities may still change their clocks, so check the date of an international meeting.
Calculated on Oct 19, 2026 from available IANA rules. Governments can revise future rules; refresh this page for an updated calculation.
When it is 09:00 in Mumbai
These two dated examples show how the same morning appointment can translate across the year. Each cell includes the destination date, in 24-hour time.
| Destination | January 15, 2026 | July 15, 2026 |
|---|---|---|
| London | 03:30Jan 15, 2026 | 04:30Jul 15, 2026 |
| New York | 22:30Jan 14, 2026 | 23:30Jul 14, 2026 |
Convert your own date from Mumbai. The examples are individual instants, not a fixed year-round difference or a recommendation of working hours.
Reference: IANA: Asian time-zone rules. Guide reviewed September 28, 2026. Method and accuracy.