Updating current time…

PST/PDT

Pacific Standard Time

UTC−8

12am

3am

6am

9am

12pm

3pm

6pm

9pm

Pacific Time is on standard time: PST (UTC−8) until Sun, Mar 14, 2027.

Keep PDT (UTC−7)

MST/MDT

Mountain Standard Time

UTC−7

1h ahead

12am

3am

6am

9am

12pm

3pm

6pm

9pm

Mountain Time is on standard time: MST (UTC−7) until Sun, Mar 14, 2027.

Keep MDT (UTC−6)

Quick answers

Selected conversion

8:30 am08:30 PST (UTC-8), Nov 1, 2026 = 9:30 am09:30 MST (UTC-7), Nov 1, 2026

PST is 1 hour behind MST.

PDT and MDT examples

These examples always use PDT (UTC-7) and MDT (UTC-6). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.

PDT is 1 hour behind MDT.

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 PDT time with MDT time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.

Time Difference

Pacific Standard Time is 1 hour behind Mountain Standard Time.
8:30 am08:30 in PST is 9:30 am09:30 in MST

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

8:30 am08:30 Pacific Standard Time (PST). Offset UTC -8:00 hours
9:30 am09:30 Mountain Standard Time (MST). Offset UTC -7:00 hours

8:30 am08:30 PST / 9:30 am09:30 MST

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
PST	MST
	1:00am MDT UTC-6
	1:00am
	3:00am
	4:00am
	5:00am
	6:00am
	7:00am
	8:00am
	9:00am
	10:00am
	11:00am
	12:00pm
	1:00pm
	2:00pm
	3:00pm
	4:00pm
	5:00pm
	6:00pm
	7:00pm
	8:00pm
	9:00pm
	10:00pm
	11:00pm
	12:00am next day
	01:00 MDT UTC-6
	01:00
	03:00
	04:00
	05:00
	06:00
	07:00
	08:00
	09:00
	10:00
	11:00
	12:00
	13:00
	14:00
	15:00
	16:00
	17:00
	18:00
	19:00
	20:00
	21:00
	22:00
	23:00
	00:00 next day

Pacific Daylight Time

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

Countries using this time zone: Mexico, United States

Principal Cities: The largest city in the PDT 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: HAP - Heure Avancée du Pacifique

Spanish: PT - Zona Noroeste

Map of the areas on Pacific Daylight Time (PDT) — PDT part of the year
Today the shaded areas are on UTC−8 (Pacific Standard Time).
Open the world time zone map © OpenStreetMap

Daylight Saving: Pacific Daylight Time (PDT) is a daylight saving/summer time zone, but some places set clocks back one hour during winter and observe Pacific Standard Time (PST).

End: Pacific Daylight Time (PDT) ended on Sunday, November 1, 2026 at 2:00 am02:00 local time and clocks were set one hour back to Sunday, November 1, 2026, 1:00 am01:00 local standard time instead. Daylight saving ends annually on the first Sunday of November.

Start: Pacific Daylight Time (PDT) starts on Sunday, March 14, 2027 at 2:00 am02:00 local time and clocks are set one hour forward to Sunday, March 14, 2027, 3:00 am03:00. Daylight saving starts annually on the second Sunday of March.

See USA daylight saving time and upcoming clock changes worldwide.

PDT representations, usage and related time zones

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

-07 - basic short
-0700 - basic
-07:00 - extended

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

-0700 - sign character (-) followed by a four digit time providing hours (07) and minutes (00) of the offset. Indicates an offset of seven hours to the west of the zero meridian.

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

Tango - Military abbreviation for PDT
T - short form of 'Tango'

IANA/Olson: Reflects PDT 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

Time zones with the GMT -7 offset:

MST - Mountain Standard Time
PDT - Pacific Daylight Time
YST - Yukon Standard Time
T - Tango Time Zone

Mountain Daylight Time

Offset: MDT is 6 hours behind Greenwich Mean Time (GMT).

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

Principal Cities: The largest city in the MDT time zone is Ciudad Juárez in Mexico, with about 1.512 million people. Other major cities in this time zone include Denver, El Paso, Albuquerque, Colorado Springs.

French: HAR - Heure Avancée des Rocheuses

Spanish: MT - Zona Pacífico

Map of the areas on Mountain Daylight Time (MDT) — MDT part of the year
Today the shaded areas are on UTC−7 (MST).
Open the world time zone map © OpenStreetMap

Daylight Saving: Mountain Daylight Time (MDT) is a daylight saving/summer time zone, but some places set clocks back one hour during winter and observe Mountain Standard Time (MST).

End: Mountain Daylight Time (MDT) ended on Sunday, November 1, 2026 at 2:00 am02:00 local time and clocks were set one hour back to Sunday, November 1, 2026, 1:00 am01:00 local standard time instead. Daylight saving ends annually on the first Sunday of November.

Start: Mountain Daylight Time (MDT) starts on Sunday, March 14, 2027 at 2:00 am02:00 local time and clocks are set one hour forward to Sunday, March 14, 2027, 3:00 am03:00. Daylight saving starts annually on the second Sunday of March.

See USA daylight saving time and upcoming clock changes worldwide.

MDT representations, usage and related time zones