Convert UTC to Kolkata time: when it is 12:00 UTC it is 17:30 in Kolkata in January and 17:30 in July. Kolkata is on UTC+05:30 in standard time, all year. The full 24-hour conversion table is below, and the UTC converter does the conversion live for any date and time.
Try the tool: UTC Converter — convert any UTC time to Kolkata time, or Kolkata time back to UTC, with the offset shown.
Current UTC time and the time in Kolkata
UTC is the world's reference time — it never observes daylight saving, and every other time zone is defined as an offset from it. The table shows four reference instants and what time they are in Kolkata, in January and in July.
| UTC | Kolkata in January | Kolkata in July |
|---|---|---|
| 00:00 | 05:30 | 05:30 |
| 06:00 | 11:30 | 11:30 |
| 12:00 | 17:30 | 17:30 |
| 18:00 | 23:30 | 23:30 |
If the January and July columns are the same, Kolkata's offset does not change — it does not observe daylight saving. If they differ by an hour, that hour is daylight saving, and the Kolkata DST 2026 page gives the exact dates. The world clock shows the current time in Kolkata live, and the time in Kolkata page explains the city's time zone in full.
Kolkata's offset from UTC
Kolkata stays on UTC+05:30 all year — it does not observe daylight saving, so its offset from UTC never changes.
| Period | Offset | In effect |
|---|---|---|
| All year | UTC+05:30 | The offset never changes |
| Right now (11 November 2026) | UTC+05:30 | The offset never changes |
The offset is the only number you need. To convert UTC to Kolkata time, add the offset. To convert Kolkata time to UTC, subtract it. The offset to use is the one in effect on the date you are converting — not today's offset, and not the offset you remember from last summer. The converter on this page's tool does that for you: enter the UTC time and the date, and it looks up the offset from the IANA database for that date.
UTC to Kolkata — full conversion table
Every hour of the day, converted from UTC to Kolkata local time. The January column uses the winter offset (UTC+05:30); the July column uses the summer offset (UTC+05:30). The two columns are identical, because Kolkata does not observe daylight saving.
| UTC | Kolkata (January) | Kolkata (July) |
|---|---|---|
| 00:00 | 05:30 | 05:30 |
| 01:00 | 06:30 | 06:30 |
| 02:00 | 07:30 | 07:30 |
| 03:00 | 08:30 | 08:30 |
| 04:00 | 09:30 | 09:30 |
| 05:00 | 10:30 | 10:30 |
| 06:00 | 11:30 | 11:30 |
| 07:00 | 12:30 | 12:30 |
| 08:00 | 13:30 | 13:30 |
| 09:00 | 14:30 | 14:30 |
| 10:00 | 15:30 | 15:30 |
| 11:00 | 16:30 | 16:30 |
| 12:00 | 17:30 | 17:30 |
| 13:00 | 18:30 | 18:30 |
| 14:00 | 19:30 | 19:30 |
| 15:00 | 20:30 | 20:30 |
| 16:00 | 21:30 | 21:30 |
| 17:00 | 22:30 | 22:30 |
| 18:00 | 23:30 | 23:30 |
| 19:00 | 00:30 | 00:30 |
| 20:00 | 01:30 | 01:30 |
| 21:00 | 02:30 | 02:30 |
| 22:00 | 03:30 | 03:30 |
| 23:00 | 04:30 | 04:30 |
Use the table by finding the UTC hour in the first column and reading across. Note the date change: a UTC time late in the evening is the next day in Kolkata when the offset is positive and large — 22:00 UTC is 03:30 the next day in Kolkata in January — and a UTC time early in the morning is the previous day in Kolkata when the offset is negative. The date matters as much as the time: a meeting at 02:00 UTC on Tuesday is a Monday evening meeting in the Americas.
When the offset changes
The offset never changes. Kolkata does not observe daylight saving, so the table above is right on every day of the year. India has never observed daylight saving in the modern era. The country uses a single time zone, and in most of India the difference between summer and winter day length is small. The only thing that changes is the time in the place you are converting from — if that place observes daylight saving, its offset from UTC will move, and the difference between it and Kolkata will move with it.
Kolkata time to UTC
The reverse conversion — Kolkata local time back to UTC — is the same table read backwards. Six examples, for January:
| Kolkata local | UTC (January) | UTC (July) |
|---|---|---|
| 00:00 | 18:30 | 18:30 |
| 06:00 | 00:30 | 00:30 |
| 09:00 | 03:30 | 03:30 |
| 12:00 | 06:30 | 06:30 |
| 15:00 | 09:30 | 09:30 |
| 21:00 | 15:30 | 15:30 |
The reverse table is the one to use when you are telling someone in another time zone when something happens in Kolkata. A flight that departs Kolkata at 09:00 local time departs at 03:30 UTC in January — and that UTC time is what the airline's systems, the air traffic controllers and the arrival airport all use. The flight time calculator works out the arrival time as well, including the date change.
Scheduling with UTC-based teams
Teams that work in UTC — software teams, aviation, shipping, scientific collaborations — schedule in UTC precisely because it never changes. If your team works in UTC, the time in Kolkata is UTC plus UTC+05:30 in January and UTC plus UTC+05:30 in July, and the only question is which of those applies on the meeting date. Put the UTC time in the invitation as well as the local time, and nobody has to convert.
The practical working hours for a UTC-based team and Kolkata are: 09:00–17:00 in Kolkata is 03:30–11:30 UTC in January and 03:30–11:30 UTC in July. A meeting at 14:00 UTC is 19:30 in Kolkata in January — inside the working day — and 19:30 in July. A meeting at 08:00 UTC is 13:30 in Kolkata in January, which is before the working day starts. The meeting planner finds the overlap for any two cities, and the meeting time finder finds it for a whole team.
Frequently asked questions
What time is it in Kolkata when it is 12:00 UTC?
It is 17:30 in January and 17:30 in July. The answer is the same all year, because Kolkata does not observe daylight saving.
What is Kolkata's offset from UTC?
Kolkata is on UTC+05:30 in standard time, all year.
How do I convert UTC to Kolkata time?
Add Kolkata's offset to the UTC time: UTC+05:30 in January, UTC+05:30 in July. The UTC converter does it for any date, and the table above covers every hour.
Does Kolkata observe daylight saving time?
No. Kolkata does not observe daylight saving, so its offset of UTC+05:30 never changes.
What date is it in Kolkata when it is 22:00 UTC?
It is the next day: 22:00 UTC is 03:30 the following day in Kolkata in January (and 03:30 in July). The date change is the part of UTC conversion people most often forget.
What time zone is Kolkata in?
Kolkata is in the IANA time zone Asia/Kolkata, in India. See the time in Kolkata page for the full explanation.
Sources
- IANA Time Zone Database, via Node.js Intl (
Intl.DateTimeFormatwithtimeZone) — offsets, daylight saving dates and local times in this article were worked out from the IANA database, not typed from memory. - TimeFlow's own time-zone data (
data/cities.ts,data/dst.ts), computed from the IANA database. - TimeFlow's UTC converter and world clock — the live tools behind the numbers on this page.
- Time-zone and daylight saving rules are set by governments and can change. For flights, deadlines and meetings that cannot move, confirm the time with an official source.