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PDT/PST

Pacific Daylight Time

UTC−7

12am

3am

6am

9am

12pm

3pm

6pm

9pm

Pacific Time is on daylight saving time: PDT (UTC−7) until Sun, Nov 1.

Use PST all year (UTC−8)

MDT/MST

Mountain Daylight Time

UTC−6

1h ahead

12am

3am

6am

9am

12pm

3pm

6pm

9pm

Mountain Time is on daylight saving time: MDT (UTC−6) until Sun, Nov 1.

Arizona stays on MST (UTC−7).

Denver · MDT (UTC−6)Arizona · MST all year (UTC−7)

Quick answers

Selected conversion

5:00 am05:00 PDT (UTC-7), Oct 16, 2026 = 6:00 am06:00 MDT (UTC-6), Oct 16, 2026

PDT is 1 hour behind MDT.

PST (US winter time, UTC-8) and MST examples

These examples always use PST (UTC-8) and MST (UTC-7). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.

PST is 1 hour behind MST.

PST is US Pacific winter time (early November to mid-March). The rest of the year Los Angeles uses PDT (UTC-7), one hour later. In July, 10:00 am PDT = 11:00 am MDT10:00 PDT = 11:00 MDT. For Pacific Time that follows daylight saving time, use PT to MST. For daylight-time examples, use PDT to MDT.

Popular PST to MST conversions

Popular PST to MST time conversions
PST (US winter time, UTC-8)	PST (US winter time, UTC-8) 24-hour	MST	MST 24-hour
9:00 am	09:00	10:00 am	10:00
10:00 am	10:00	11:00 am	11:00

How the time difference changes

For most of the year, PDT is 1 hour behind MDT. From Nov 1, 2026 to Mar 14, 2027, PST is 1 hour behind MST. Briefly around clock changes, PDT and MST have the same time or PST is 2 hours behind MDT.

For most of the year, working hours of 9:00 am to 6:00 pm in PDT correspond to 10:00 am to 7:00 pm in MDT. At other times of the year, working hours of 9:00 am to 6:00 pm in PST correspond to 10:00 am to 7:00 pm in MST.For most of the year, working hours of 09:00 to 18:00 in PDT correspond to 10:00 to 19:00 in MDT. At other times of the year, working hours of 09:00 to 18:00 in PST correspond to 10:00 to 19:00 in MST.

Compare PST time with MST time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.

Time Difference

Pacific Daylight Time is 1 hour behind Mountain Daylight Time.
5:00 am05:00 in PDT is 6:00 am06:00 in MDT

PDT to MDT call time
Best time for a conference call or a meeting is between 9am-5pm09:00-17:00 in PDT which corresponds to 10am-6pm10:00-18:00 in MDT

5:00 am05:00 Pacific Daylight Time (PDT). Offset UTC -7:00 hours
6:00 am06:00 Mountain Daylight Time (MDT). Offset UTC -6:00 hours

5:00 am05:00 PDT / 6:00 am06:00 MDT

Choose an hour to update the converter. Day labels such as “next day” or “+1” are relative to the selected date in the first column. Use Up and Down arrow keys, Home or End to move between hours, then Enter or Space to select.

Hourly time comparison
PDT	MDT
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	12:00am next day
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	00:00 next day

Pacific Standard Time

Offset: PST is 8 hours behind Greenwich Mean Time (GMT).

Countries using this time zone: Mexico, United States

Principal Cities: The largest city in the PST time zone is Los Angeles in the United States, with about 3.821 million people. Other major cities in this time zone include Tijuana, San Diego, Mexicali, San Jose.

French: HNP - Heure Normale du Pacifique

Spanish: PT - Tiempo del Pacífico, PT - Zona Noroeste

Map of the areas on Pacific Standard Time (PST) — PST part of the year
Today the shaded areas are on UTC−7 (PDT).
Open the world time zone map © OpenStreetMap

Daylight Saving: This is a standard time zone. During summer, some places set clocks forward one hour for daylight saving time and observe Pacific Daylight Time (PDT).

End: Pacific Standard Time (PST) ended on Sunday, March 8, 2026 at 2:00 am02:00 local time and clocks were set one hour forward to Sunday, March 8, 2026, 3:00 am03:00 local daylight time instead. Standard time ends annually on the second Sunday of March.

Start: Pacific Standard Time (PST) starts on Sunday, November 1, 2026 at 2:00 am02:00 local time and clocks are set one hour back to Sunday, November 1, 2026, 1:00 am01:00. Standard time starts annually on the first Sunday of November.

See USA daylight saving time and upcoming clock changes worldwide.

PST representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data

-08 - basic short
-0800 - basic
-08:00 - extended

Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers

-0800 - sign character (-) followed by a four digit time providing hours (08) and minutes (00) of the offset. Indicates an offset of eight hours to the west of the zero meridian.

Military/NATO: Used by the U.S. military, Chinese military and others

Uniform - Military abbreviation for PST
U - short form of 'Uniform'

IANA/Olson: Reflects PST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems

America/Ensenada
America/Los_Angeles
America/Santa_Isabel
America/Tijuana
America/Vancouver
Canada/Pacific
Mexico/BajaNorte
PST8PDT
US/Pacific

PST Abbreviation: Several time zones share PST abbreviation and it could refer to these time zones

Pacific Standard Time - UTC -8
Pitcairn Standard Time - UTC -8

Time zones with the GMT -8 offset:

AKDT - Alaska Daylight Time
PST - Pacific Standard Time
PT - Pacific Time
PST - Pitcairn Standard Time
U - Uniform Time Zone

Mountain Standard Time

Offset: MST is 7 hours behind Greenwich Mean Time (GMT).

Countries using this time zone: Canada, Mexico, United States

Principal Cities: The largest city in the MST time zone is Phoenix in the United States, with about 1.65 million people. Other major cities in this time zone include Ciudad Juárez, Hermosillo, Culiacán, Denver.

French: HNR - Heure Normale des Rocheuses

Spanish: MT - Zona Pacífico

Map of the areas on Mountain Standard Time (MST) — MST all year MST part of the year
Today the lighter areas are on UTC−6 (MDT).
Open the world time zone map © OpenStreetMap

Daylight Saving: This is a standard time zone. During summer, some places set clocks forward one hour for daylight saving time and observe Mountain Daylight Time (MDT).

End: Mountain Standard Time (MST) ended on Sunday, March 8, 2026 at 2:00 am02:00 local time and clocks were set one hour forward to Sunday, March 8, 2026, 3:00 am03:00 local daylight time instead. Standard time ends annually on the second Sunday of March.

Start: Mountain Standard Time (MST) starts on Sunday, November 1, 2026 at 2:00 am02:00 local time and clocks are set one hour back to Sunday, November 1, 2026, 1:00 am01:00. Standard time starts annually on the first Sunday of November.

See USA daylight saving time and upcoming clock changes worldwide.

MST representations, usage and related time zones