Bangkok is 1 hour 30 minutes ahead of Colombo. Colombo uses Sri Lanka Standard Time (SLST, UTC+5:30) while Bangkok uses Indochina Time (ICT, UTC+7). When it's 12:00 PM in Colombo, it's 1:30 PM in Bangkok.
Neither city observes daylight saving time, so the time difference remains constant year-round.
Best calling time: 8:30 AM - 4:30 PM Colombo time. This corresponds to 10:00 AM - 6:00 PM in Bangkok, covering standard business hours.
Colombo and Bangkok are both major South Asian and Southeast Asian tourism and business hubs. Bangkok is a popular destination for Sri Lankan travelers, and there are direct flights connecting the two cities.