pdt

[Image of a map of the United States with the Pacific Time Zone highlighted] The terms PT and PDT are often used interchangeably, but they actually have distinct meanings. PT stands for Pacific Time, while PDT stands for Pacific Daylight Time. Both time zones are used in the western United States and Canada, but they differ in how they observe daylight saving time (DST). Pacific Time (PT) Pacific Time (PT) is a standard time zone that is 8 hours behind Coordinated Universal Time (UTC)....