History and Overview

The Pacific Daylight Time zone is seven hours behind Coordinated Universal Time (UTC). The region that this encompasses is the western coast of the United States, specific Canadian provinces, và a Mexican state. There are also other times zones within this same offset that we’ll explore in more detail.

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Join us as we examine this region, the difference between PDT & PST, which locations observe sầu it, and learn some more facts about Daylight Saving Time that you may not already know.

Time Zone:

Pacific Daylight Time, PDT

UTC offset:

UTC -7:00

Time Zone Abbreviation:


Popular Time Zones


The Difference Between PDT và PST

During the summer, parts of the world, the United States mostly, observe Daylight Saving Time where the clocks are turned back an hour to allow for more sunlight during the summer months. During this time the offphối for this time zone is UTC -7:00. When the winter months arrive sầu & the clocks are mix bachồng to their original time, the zone is then designated as Pacific Standard Time (PST).

During the winter months when PST is in effect, the offmix is UTC -8:00. Understanding this distinction will help you better convert between time zones, but if you’d rather not do the math, you can also use our extremely helpful time zone converter lớn vì chưng the job for you. If you are looking khổng lồ get your hands a little dirty, let’s try an example of converting from PDT to lớn EDT, shall we?

Since PDT is seven hours offmix from UTC, we need to trương mục for the three hours difference lớn EDT which is 4 hours offset from UTC. Knowing this allows us to vì chưng a quichồng calculation, keeping in mind that we’re moving forward in time three hours since we’re moving up in the offsets.

So, 10:00AM in PDT would be 1:00PM in EDT. The three hours is added to lớn the time since we’re moving upward in the offmix from 7 hours to lớn 4 subtracted from UTC.

Countries và States That Observe sầu PDT

The Pacific Time zone is used in several U.S. States, Canada, & Mexico. Below are locations in each region where PDT is used during the summer months:

CaliforniaWashingtonOregon - all except for the majority of Malheur County on the Idaho border.Nevada - Legally, all of Nevada does, but the border town of West Wendover, and the towns of Jackpot, Jarbidge, Mountain City, và Owyhee all observe Mountain Time because of the proximity khổng lồ & connections with nearby towns in IdahoIdaho Panhandle - The region of Idaho north of the Salmon River

For Canadomain authority PDT is observed in the following locations:

British Columbia - except for the eastern communities of Cranbrook, Golden, & Invermere which are in the MST/MDT zone.Yukon

There is one Mexican State that uses PDT in the summer và PST in the winter. It is Baja California Norte. Before we move sầu on, let’s examine several other time zones that also adhere lớn the offset of UTC -7:00:

MST - Mountain Standard Time

This time zone has areas that observe DST, at which times of year it is known as MDT. There are actually thirteen states that observe MST during the winter và MDT in the summer. In many of these states however, it is specific locations which observe this time zone.

In Canadomain authority, there are five sầu provinces that observe Mountain Standard Time & the DST variation. Again in some of these cases, there are only specific areas that use the time zone. Finally, there are five sầu Mexican states that utilize this zone. Arizomãng cầu and the Mexican state of Sonora are the only two locations that don’t observe DST and therefore have sầu MST time all year.

T - Tango Time Zone (Military)

This UTC -7:00 time zone is utilized by military aviation. It is most commonly used over the ocean between the longitudes of 112.5 degrees west & 97.5 degrees west. The designation for this time zone is written in military time with “T” being used to lớn show the time zone. An example would be 0800T or “zero eight hundred Tango.”

11 Facts About Daylight Saving Time You Probably Didn’t Know

Since this time zone is reserved for areas that observe DST, here are ten facts about this practice of changing the clocks twice a year that you may not have heard before. Enjoy!

It Started as a Joke

The first time DST came up as an idea was in Benjamin Franklin’s 1784 letter entitled An Economical Project. While he did propose something along the lines of this idea, he was being satirical. In the letter he claims that total of 64 million pounds of wax could be saved in the thành phố of Paris if people woke up with the sun.

To make people wake up earlier he suggested things lượt thích taxing people with shutters on their windows, rationing candles, and waking people up with ringing church bells or firing cannons. Clearly he wasn’t being serious, but some people thought it was a good idea anyway.

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It’s Bad For Your Heart

According khổng lồ studies conducted by hospitals, Daylight Saving Time’s hour change interrupts our circadian rhythms when we sleep and increases găng lớn the point where heart attacks are far more common than any other time during the year. Following the spring change, local Michigan hospitals reported an increase of heart attacks by as much as 25 percent!

It Thwarted Terrorists Once

Oh yeah, DST actually did something good when it caused a terrorist attachồng lớn happen off schedule. In September of 1999 the West Bank was on DST while Israel was on standard time. The terrorists didn’t tài khoản for this & set their bomb timers incorrectly khổng lồ where they went off an hour earlier than expected. Three terrorists were killed as opposed khổng lồ two busloads of people, which were the targets.

There’s a Reason it Happens at 2 A.M

In case you thought that the chosen was time was completely random, it’s actually not. 2 A.M is the least disruptive time of day for businesses, và it’s the soonest hour after midnight where turning the cloông chồng forward or backward won’t change the day.

It Got one Man Out of The Draft

When the Vietnam giới War was going on, DST managed lớn save one man from having khổng lồ go fight overseas. In his state of Delaware, he argued, standard time was the official method for recording birth dates. He argued that he was born a day earlier compared lớn DST which would have sầu given hyên a higher draft lottery number. The argument worked, he didn’t have khổng lồ go khổng lồ war.

Bars Aren’t xuất hiện an Extra Hour

For those who enjoy late nights, you may think that bars will be open an extra hour in the fall when the clocks go back, but state laws have sầu found ways around this. For example, in California bars are required to lớn cthảm bại at 1:59 A.M which is one minute before DST ends each fall. Other states word it as “two hours after midnight.” which would negate the ability for them khổng lồ stay open late.

DST Began in The U.S During WWI

The United States first started using DST during WWI when President Woodrow Wilson wanted to limit coal consumption. After the war, he wanted to keep the practice in place but Congress repealed the plan, even going so far as lớn override a presidential veto!

It Sent Cloông xã into Chaos

In WWII, DST caused what time magazine called “a chaos of clocks.” Up until 1966 the states và governments within good start và over their DST whenever they felt lượt thích it. During one period of time you could ride on a train from Ohio lớn West Virginia & travel through seven different time changes!

There’s No “S”

The official title is Daylight Saving Time, not Daylight Savings Time. Despite this distinction, there are millions of searches each year online for both variations.

Not Every U.S. State Observes it

There are only 48 states that observe DST. The states of Arizona và Hawaii have sầu standard time throughout the year. The Navajo Nation in Arizomãng cầu still observes DST however.

It Still Makes People Late

Despite the fact that most electronic clocks on phones & other devices change automatically, people are still often late or early on the days that the time changes. A Rasmussen Report showed that 27% of Americans admitted to lớn the time change making them early or late.

Is DST Going Away Anytime Soon?

There has been a seemingly ongoing war happening over whether DST is something we should keep around or something that should have sầu ended with the last world war. Washington state, a current participant in the practice is beginning lớn show signs of joining the admittedly small danh mục of states that vày not follow the practice. Does this mean other states in the PDT zone will follow suit?

A bill proposed khổng lồ the state government in February of năm ngoái brings many of the arguments against the practice khổng lồ light. Five sầu other states including Oregon have sầu begun making similar pursuits, leading to the question of whether or not this practice will last much longer after all the opposition it has faced.

Only time will tell, but for now, there are still several U.S. States và countries that following the change khổng lồ PDT during the summer months of the year.