In the graph below you see the time zone difference between Japan Standard Time and India Standard Time. Drag the bubble to adjust the time and to see the corresponding time in the other time zone.
Japan Standard Time is the time zone of Japan, including cities like Tokyo, Osaka, Sapporo, Nagoya and Fukuoka. India Standard Time is the time zone of India, with places like New Delhi, Mumbai, Bangalore, Kolkata and Colombo.
Usually it is preferable to schedule meetings after lunch for the person in JST and the morning for the person in IST.
Japan Standard Time, or JST for short, is the standard time zone of Japan. It is 9 hours ahead of UTC. This also includes the islands of Okinawa even though they previously used a separate time zone. These days all of Japan runs on Japan Standard Time, from Hokkaido to Kyushu.
Japan is the only country using Japan Standard Time. It is however the same time as KST – Korean Standard Time and AWDT – Australian Western Daylight Time (i.e. when Western Australia applies Daylight Saving Time).
All cities in Japan applies JST, including Tokyo, Kyoto, Sapporo, Fukuoka, Hiroshima, Nagano and Nagoya.
DST (Daylight Saving Time) is currently not applied in Japan, although there have been attempts to re-introduce it. Especially the northern island of Hokkaido are in favor of DST as the sun rises very early in summer under the current system. Another argument to re-introduce DST has been that it would have a positive effect on emissions, but this has not been proven in any studies yet.
India, Sri Lanka
Delhi, Colombo, Kolkata and Mumbai
This timezone does not observe daylight saving time so the time difference always stay the same. You however need to pay attention to if the other time zone is observing DST as this will make a difference.
IST can also refer to Irish Standard Time or Israeli Standard time, but most of the times it is India that is being referred to – just make sure to double check this before you send that calendar invite!