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West Bengal, India

West Bengal uses India Standard Time, UTC+5:30, all year. Kolkata, Howrah, Asansol, Siliguri, and Durgapur share one official clock, though the state’s north–south extent produces local differences in sunrise and daylight.

Kolkata, India

Saturday, 5 September 2026

UTC+5:30 · Asia/Kolkata

Time and sun data for Kolkata — the largest city of West Bengal

The sun in Kolkata

Sunrise 5:22 AM Solar noon 11:37 AM Sunset 5:52 PM Daylight 12 h 31 min Night 11 h 29 min Civil twilight 4:59 AM – 6:15 PM

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Current time in West Bengal, India

The current time in West Bengal is IST. Kolkata and every other location in the state follow the same national standard, with no daylight saving change. This consistency simplifies domestic planning. An appointment set for a given hour in Kolkata occurs at that same official hour in Siliguri or Asansol, although travel time and daylight conditions differ.

From Kolkata traffic to a quiet northern morning, the scenery changes more readily than the time zone.

West Bengal’s principal urban centres

UTC+5:30 applies throughout the state, from the Himalayan foothills to the coast. Major cities and urban centres include: Kolkata, the state capital and largest metropolitan centre Howrah, directly across the Hooghly from Kolkata

Asansol, a major western industrial city Siliguri, a key northern transport and commercial hub Durgapur, an important planned industrial city No watch adjustment is needed between these places. The same rule applies when crossing into another Indian state: the national civil-time standard remains IST.

For a conversion from UTC, add five hours and thirty minutes. For calls abroad, verify the other city’s seasonal clock policy because West Bengal itself never changes its offset.

Sunrise from the coast to the north

Sunrise and sunset depend on coordinates and date. Kolkata’s daily solar times do not exactly match Siliguri’s because the cities differ in both latitude and longitude. Western districts likewise differ from places farther east.

Seasonal variation influences day length, while cloud, mist, buildings, hills, and the local horizon affect when sunlight is actually visible. These conditions should not be confused with a change in the official time zone.

Identify the city, district, or coordinates. Choose the relevant date. Confirm that the result is presented in IST. Pair the calculation with a current weather check when necessary. A city-level reading is suitable for photography, outdoor exercise, ferry plans, travel, or religious observance. Use the statewide time for clock coordination and the local solar result for daylight planning.

Questions and answers

What time zone does Kolkata use?
Kolkata uses India Standard Time, UTC+5:30.
Is the time different in Siliguri?
No. Siliguri shares the same official time as Kolkata.
Are sunrise times identical across West Bengal?
No. They vary by date and geographic location despite the common clock.
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