Does this converter handle daylight saving time?

Yes. The offset between London and Kolkata (India) can change across the year as either zone enters or leaves DST. Pick any date in the converter and the exact offset for that date is used.

🇬🇧 London to Kolkata (India) 🇮🇳 time converter

Convert any time from London (GMT/BST) to Kolkata (India) (IST), with daylight saving handled correctly for the date you choose.

Kolkata (India) is currently 4.5 hours ahead of London.

London: Fri, Jun 19, 2026, 2:24 PM UTC+01:00 (GMT+1) · Kolkata (India): Fri, Jun 19, 2026, 6:54 PM UTC+05:30 (GMT+5:30)

London 00h → 23hblue/green = 9am–6pm working hoursKolkata (India) local hour

Convert London to Kolkata (India) on any date

From zone

To zone

Date & time (in “from” zone)

Get this conversion as JSON (developer API)

curl "https://tz.wrapper-agency.com/api/v1/tz?from=Europe%2FLondon&to=Asia%2FKolkata&time=2008-11-04T09%3A00"

Free timezone API — no key during beta. DST-correct, IANA tz database.

Current offsets

🇬🇧 London	UTC+01:00
🇮🇳 Kolkata (India)	UTC+05:30
Difference	+4.5h

FAQ

What time is it in Kolkata (India) when it's noon in London?: Use the converter above — enter 12:00 on your date in London and you'll get the exact Kolkata (India) local time, DST included.
Why does the time difference change during the year?: London and Kolkata (India) may observe daylight saving on different schedules (or not at all), so the gap between them shifts on clock-change dates.