Pacific Standard Time (PST)
The differences of the several time zones to each other are always specified in relation to the "Universal Time Coordinated" (UTC), the time on the prime meridian (zero longitude). Phoenix, for example, is on the 122nd degree of longitude west and thus in the UTC-7 time zone. The Pacific Standard Time is consistent with UTC -8.
Countries with the Pacific Standard Time, in which a switch to daylight saving time is common, turn the clock forward by 1 hour in summer. Like this they switch to Pacific Daylight Time (PDT)
and reach UTC -7.
The Pacific Standard Time applies to 2 countries.