Seattle is located in the Pacific Standard Time (PST) zone, which is 3 hours earlier than Eastern Standard Time (EST).
The time zone in which Seattle is located is called the Pacific Standard Time (PST) zone. This time zone is 3 hours earlier than Eastern Standard Time (EST). Since time zones have been established roughly every 15 degrees longitude to correspond with the Earth's rotation, they allow for the sun to be generally overhead at noon. The longitude median for the Pacific Standard Time zone is approximately 124W, and it encompasses the region from Puget Sound, WA, to San Diego, CA, in the United States. Seattle, situated within this zone, follows the standard time set for this region.