Where the Asia/Kolkata time zone is used
Countries: 🇮🇳 India.
Also known in software as: Asia/Calcutta.
Largest cities on Asia/Kolkata
MumbaiMaharashtra
DelhiDelhi
BengaluruKarnataka
HyderabadTelangana
AhmedabadGujarat
ChennaiTamil Nadu
KolkataWest Bengal
SuratGujarat
PuneMaharashtra
JaipurRajasthan
KanpurUttar Pradesh
LucknowUttar Pradesh
Asia/Kolkata time zone
India Time
India Standard Time (IST)
IANA: Asia/Kolkata · UTC+5:30
Daylight saving time in Asia/Kolkata
Asia/Kolkata does not use daylight saving time. The offset stays UTC+5:30 all year.
Sunrise and sunset in Asia/Kolkata today
Sunrise 05:27 · Sunset 17:24
Daylight 11h 58m · Solar noon 11:26
Time in Asia/Kolkata vs major world cities
| City | Local time | Difference from Asia/Kolkata |
|---|
| New York | Thu | 9.5 hours behind |
| Los Angeles | Thu | 12.5 hours behind |
| London | Thu | 4.5 hours behind |
| Paris | Thu | 3.5 hours behind |
| Dubai | Thu | 1.5 hours behind |
| Singapore | Fri | 2.5 hours ahead |
| Tokyo | Fri | 3.5 hours ahead |
| Sydney | Fri | 4.5 hours ahead |
| Johannesburg | Thu | 3.5 hours behind |
| São Paulo | Thu | 8.5 hours behind |
| Chicago | Thu | 10.5 hours behind |
What time zone is Asia/Kolkata in?
Asia/Kolkata is on India Time (IST, UTC+5:30). The IANA identifier is Asia/Kolkata.
Does Asia/Kolkata observe daylight saving time?
No. Asia/Kolkata keeps UTC+5:30 all year, so its time difference with places that do change their clocks shifts by an hour twice a year.
Asia/Kolkata in software and databases
Older software may still use Asia/Calcutta; these are aliases of Asia/Kolkata and give identical times.
Standard offset UTC+5:30, no daylight saving time (as of 2026).
October 2026 calendar for Asia/Kolkata
| Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|
| | | 1 | 2 | 3 | 4 |
| 5 | 6 | 7 | 8 | 9 | 10 | 11 |
| 12 | 13 | 14 | 15 | 16 | 17 | 18 |
| 19 | 20 | 21 | 22 | 23 | 24 | 25 |
| 26 | 27 | 28 | 29 | 30 | 31 | |
Frequently asked questions about Asia/Kolkata
What time zone is Asia/Kolkata in?
India Time (IST), UTC+5:30; IANA zone Asia/Kolkata.
Does Asia/Kolkata have daylight saving time?
No, it stays on UTC+5:30 all year.