One Indian rule used by two city labels
Asia/Kolkata is the IANA identifier used here for both Mumbai and New Delhi. It has a half-hour offset, UTC+05:30, across the displayed 2026 samples. City labels and time-zone identifiers serve different purposes: two participants may use the same clock rules while needing different working hours.
Offsets in the bundled rules
| Date | UTC offset | Display abbreviation |
|---|---|---|
| 2026-01-15 | UTC+05:30 | IST |
| 2026-07-15 | UTC+05:30 | IST |
| 2026-10-27 | UTC+05:30 | IST |
| 2026-11-03 | UTC+05:30 | IST |
Resolve the wall time before exporting
18:30 on 27 October 2026 is 13:00 UTC. Subtract the entire five hours and thirty minutes; dropping the minutes would change the event. A 90-minute meeting ends at 20:00 locally and 14:30 UTC.
Use this identifier in a plan
Find Asia/Kolkata in the zone directory or choose Mumbai from the city directory. Add the other meeting locations, enter their availability, and check the complete duration. The supported planning years are 2026–2035; future political rule changes may require a new data version.
A calendar export uses the resolved UTC start and end times. The zone remains part of the planning context, while the exported instant stays unambiguous when another calendar displays it in its own time zone.