World Timezones

Kolkata to Tokyo Converter

Compare Tokyo to Kolkata instead
Kolkata8:00 amMon, Jun 8
KolkataIST
India · UTC+5:30
8:00 amMon, Jun 8
12a
1a
2a
3a
4a
5a
6a
7a
8a
9a
10a
11a
12p
1p
2p
3p
4p
5p
6p
7p
8p
9p
10p
11p
TokyoJST
Japan · UTC+9
11:30 amMon, Jun 8
3a
4a
5a
6a
7a
8a
9a
10a
11a
12p
1p
2p
3p
4p
5p
6p
7p
8p
9p
10p
11p
12a
1a
2a

Offset

The time difference between Kolkata and Tokyo is 3.5 hours.

3.5 hours

Kolkata (IST) is behind Tokyo (JST).

IST: UTC+5:30

JST: UTC+9

Neither Kolkata nor Tokyo is currently observing daylight saving time.

When to schedule

Business-hours overlap: 9 AM–2 PM in Kolkata (12 PM–5 PM in Tokyo).

Both teams are in working hours during this window on weekdays.

Suggested time: 11:00 AM Kolkata (2:30 PM Tokyo).

Public holidays in 2026

National public holidays can affect availability — a counterpart is likely off work on their own holidays, so it's worth planning meetings and deadlines around them.

Japan

  • New Year's DayThu, Jan 1
  • Coming of Age DayMon, Jan 12
  • Foundation DayWed, Feb 11
  • The Emperor's BirthdayMon, Feb 23
  • Vernal Equinox DayFri, Mar 20
  • Shōwa DayWed, Apr 29
  • Constitution Memorial DayWed, May 6
  • Greenery DayMon, May 4
  • Children's DayTue, May 5
  • Marine DayMon, Jul 20
  • Mountain DayTue, Aug 11
  • Respect for the Aged DayMon, Sep 21
  • Autumnal Equinox DayWed, Sep 23
  • Sports DayMon, Oct 12
  • Culture DayTue, Nov 3
  • Labour Thanksgiving DayMon, Nov 23

About these zones

Kolkata uses India Standard Time (IST). To call India, dial +91.

Tokyo uses Japan Standard Time (JST). To call Japan, dial +81.

Tokyo is approximately 3,200 miles northeast of Kolkata.

Quick reference

Full 24-hour conversion table — tap any time to open it in the converter.

KolkataTokyoDay
12:00 am3:30 amSame day
1:00 am4:30 amSame day
2:00 am5:30 amSame day
3:00 am6:30 amSame day
4:00 am7:30 amSame day
5:00 am8:30 amSame day
6:00 am9:30 amSame day
7:00 am10:30 amSame day
8:00 am11:30 amSame day
9:00 am12:30 pmSame day
10:00 am1:30 pmSame day
11:00 am2:30 pmSame day
12:00 pm3:30 pmSame day
1:00 pm4:30 pmSame day
2:00 pm5:30 pmSame day
3:00 pm6:30 pmSame day
4:00 pm7:30 pmSame day
5:00 pm8:30 pmSame day
6:00 pm9:30 pmSame day
7:00 pm10:30 pmSame day
8:00 pm11:30 pmSame day
9:00 pm12:30 am+1 day
10:00 pm1:30 am+1 day
11:00 pm2:30 am+1 day

Daylight saving time

Neither Kolkata nor Tokyo observes daylight saving time. The offset between these zones remains constant year-round.

See the daylight saving time page for transition dates across every time zone.

Daylight today

Kolkata
Sunrise
4:52 AM
Sunset
6:21 PM
Day length
13h 28m
Tokyo
Sunrise
4:26 AM
Sunset
6:56 PM
Day length
14h 30m

Daylight overlap: 10h 34m — 4:52 AM–3:26 PM in Kolkata (8:22 AM–6:56 PM in Tokyo). Both locations are in daylight during this window.

Cities in these zones

Browse all cities to see the current local time anywhere.

Airports in these zones

Airports in India Standard Time

  • BOM
  • NMI
  • DEL
  • BLR
  • HYD
  • AMD
  • MAA
  • CCU
  • STV
  • PNQ

Airports in Japan Standard Time

  • HND
  • NRT
  • ITM
  • KIX
  • UKB
  • NGO
  • NKM
  • CTS
  • OKD
  • FUK

Related conversions

Common conversions

What is 9:00 am Kolkata in Tokyo?
9:00 am Kolkata is 12:30 pm Tokyo.
What is 12:00 pm Kolkata in Tokyo?
12:00 pm Kolkata is 3:30 pm Tokyo.
What is 12:30 pm Kolkata in Tokyo?
12:30 pm Kolkata is 4:00 pm Tokyo.
What is 2:00 pm Kolkata in Tokyo?
2:00 pm Kolkata is 5:30 pm Tokyo.
What is 5:00 pm Kolkata in Tokyo?
5:00 pm Kolkata is 8:30 pm Tokyo.
What is 11:30 pm Kolkata in Tokyo?
11:30 pm Kolkata is 3:00 am Tokyo, the next day.