Timezone Insight
The timezone in Kolkata is Asia/Kolkata (GMT+5:30).
Its current offset is GMT+05:30 (GMT+5:30).
What is the Timezone of Kolkata?
Detailed facts, current offset, DST status, and real-time data for the Asia/Kolkata timezone used by Kolkata, India.
IANA Timezone Data
How to convert from Asia/Kolkata to UTC
Converting a time from Asia/Kolkata to UTC is straightforward:
For example, if it is 12:00 in Kolkata, it is 07:00 UTC.
To convert the other way (UTC to Kolkata), add +5 hours to the UTC time. The offset changes by ±1 hour during daylight saving transitions in spring and fall.
About the Asia/Kolkata timezone
Asia/Kolkata is an IANA time zone identifier — the canonical, globally unique name for the civil time observed in Kolkata, India. Every operating system, programming language, and calendar product that supports time zones recognises this string and uses it to compute the correct local time for any given moment.
IANA time zones are maintained by the Internet Assigned Numbers Authority (IANA) and track the historical, current, and planned future civil time of every region — including daylight saving time (DST) transitions, country-level changes, and historical anomalies. This is why software like macOS, Linux, Windows, and major cloud services all use the same identifiers.
Related time zones in the Asia region
Asia/DubaiAsia/BangkokAsia/SingaporeAsia/Hong_KongAsia/ShanghaiAsia/Tokyo
Related tools
- See the current local time in Kolkata.
- Use the Kolkata vs London time difference calculator.
- Check how many hours of daylight Kolkata gets today.
- See the sunrise & sunset times in Kolkata.