Greenwich Mean Time (GMT) also known as Coordinated Universal Time (UTC) is used worldwide as the official time reference. Time zones are expressed like UTC -3h or GMT -3h, where the "-3h" refers to that time Zone being three hours before UTC or GMT. On the other hand, UTC +3h or GMT +3h would refer to that time zone being three hours after UTC of GMT. The difference in time between a Forex Broker local time and GMT (UTC) is called Broker Gmt Offset. Every Forex broker company has its .