GMT is World Time and the basis of every world time zone. GMT sets the time of day and is at the center of the time zone map. It sets current time or official time around the globe. Most of time changes are measured by GMT. GMT is regarded setting the correct time for every international time zone.

What time zone is Thailand in? Thailand Standard Time is 7 hours ahead of Greenwich Mean Time (GMT+7). At midday in Bangkok, it is 05.00 in London, midnight in New York, 21.00 the day before in Los Angeles, 15.00 in Sydney and 17.00 in Auckland.