There is no overlap between 09:00–18:00 working days in these two places.
Clock changes in Boston and Bangkok
Boston
Eastern Daylight Time (EDT)
Next clock change Sun 1 Nov 2026 (UTC−4 → UTC−5)
Bangkok
Indochina Time (UTC+7)
No daylight saving time.
Time difference between Boston and Bangkok today
Right now Bangkok is 11 hours ahead of Boston. When it is 09:00 in Boston, it is 20:00 in Bangkok. Boston is on Eastern Daylight Time (EDT); Bangkok is on Indochina Time (UTC+7).
When the Boston to Bangkok time difference changes
For most of the year Bangkok is 11 hours ahead of Boston. From 1 November to 31 December 2026, Bangkok is 12 hours ahead of Boston instead, because the two places change their clocks on different dates. Meetings booked by the usual gap land an hour off in those weeks.
Dates
Bangkok vs Boston
Length
8 March 2026 to 31 October 2026
11 hours ahead
238 days
1 November 2026 to 31 December 2026
12 hours ahead
61 days
1 January 2027 to 13 March 2027
12 hours ahead
72 days
14 March 2027 to 6 November 2027
11 hours ahead
238 days
7 November 2027 to 31 December 2027
12 hours ahead
55 days
When Boston and Bangkok are both at work
When Bangkok is 11 hours ahead of Boston: no shared 09:00 to 17:00 hours; try 07:00 in Boston (18:00 in Bangkok).
When Bangkok is 12 hours ahead of Boston: no shared 09:00 to 17:00 hours; try 07:00 in Boston (19:00 in Bangkok).
Frequently asked questions about Boston and Bangkok time
What time is it in Bangkok when it is 9:00 AM in Boston?
20:00 today; Bangkok is 11 hours ahead of Boston.
Does the time difference between Boston and Bangkok change?
Yes. It is usually 11 hours ahead, but changes when one side moves its clocks: 12 hours ahead from 1 November to 31 December 2026; 12 hours ahead from 1 January to 13 March 2027.