In the graph below you see the time zone difference between Mountain Daylight Time and Pacific Daylight Time. Drag the bubble to adjust the time and to see the corresponding time in the other time zone.
Mountain Daylight Time is the time zone of the US and Canadian states around the Rocky Mountains, including cities like Edmonton, Calgary, Denver and Salt Lake City. Pacific Daylight Time is the time zone of the Canadian and US West Coast when observing daylight saving time in the summer, with places like Seattle, Vancouver, San Francisco and Los Angeles.
Usually it is preferable to schedule meetings any time from the morning for the person in MDT and any time from the morning for the person in PDT.
MDT is observed in the Western part of central US and Canada, as well as the North West corner of Mexico. It is 6 hours behind UTC and turns into MST in the summer. In Mexico, this time zone is known as Zona Pacifico (Pacific Zone). The name Mountain Daylight Time comes from it covering the Rocky Mountains in Western United States.
In the US, Arizona, Colorado, Montana, Utah, New Mexico and Wyoming are all observing Mountain Daylight Time but there is also a bunch where part of the state observe MDT and part another time zone, like CDT or PDT.
MDT is observed in parts of Canada, the US and Mexico. The only province in Canada to be fully covered by MDT is Alberta whereas other provinces like British Columbia and Northwest Territories are split between MDT and PDT.
In Mexico, it is only the states in the north western corner of the country, including Baja California, Sinaloa and Chihuahua that observe MDT.
The largest city observing Mountain Daylight Time is Phoenix, followed by Denver and El Paso/Juarez.
MDT is observed in almost all locations that observe Mountain Time, except the states of Arizona (US) and Sinaloa (Mexico). DST is in effect between March and November and adds one hour time difference to UTC.
Pacific Daylight Time is the time of the Western United States and Canada and is typically abbreviated as PDT. It is 8 hours behind GMT. Although PDT is for the Western part of the US and Canada it is not the Westernmost – both Hawaii and Alaska are on their own time zones due to their location.
Pacific Daylight Time is for the Western US and Canada and thus include locations such as Vancouver, Seattle, San Francisco and Los Angeles. It also extends halfway down Baja California in Mexico. In addition to California and Washington also Nevada and Idaho are on PDT in the summer.
PDT is only used in the summer months so you will need to pay attention to when the switch takes place. Daylight Time is in the Pacific area observed from November to March and is one hour ahead of Pacific Standard Time.