Hong Kong is 2.5 hours ahead of Kolkata. Kolkata uses Indian Standard Time (IST, UTC+5:30) while Hong Kong uses Hong Kong Time (HKT, UTC+8). When it's 12:00 PM in Kolkata, it's 2:30 PM in Hong Kong.
Neither city observes daylight saving time, so the 2.5-hour difference remains constant year-round.
Best calling time: 6:30 AM - 3:30 PM Kolkata time. This corresponds to 9:00 AM - 6:00 PM in Hong Kong, covering standard business hours.
Kolkata and Hong Kong are major Asian business centers with historical trade connections. Both cities were British colonies and remain important financial hubs. Direct flights connect them in about 4 hours.