Boulder to PST Time Converter

Updating current time…
Boulder
Colorado, USAMST
UTC−7
12am
3am
6am
9am
12pm
3pm
6pm
9pm
PST
Pacific Standard Time
UTC−8
1h behind
12am
3am
6am
9am
12pm
3pm
6pm
9pm

Quick answers

Selected conversion

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

Boulder is 1 hour ahead of PST.

How the time difference changes

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

For most of the year, working hours of 9:00 am to 6:00 pm in Boulder correspond to 8:00 am to 5:00 pm in PDT. At other times of the year, working hours of 9:00 am to 6:00 pm in Boulder correspond to 8:00 am to 5:00 pm in PST.For most of the year, working hours of 09:00 to 18:00 in Boulder correspond to 08:00 to 17:00 in PDT. At other times of the year, working hours of 09:00 to 18:00 in Boulder correspond to 08:00 to 17:00 in PST.

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

Time Difference

MST (Mountain Standard Time) is 1 hour ahead of Pacific Standard Time.
9:30 am09:30 in Boulder, CO, USA is 8:30 am08:30 in PST

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

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

9:30 am09:30 Boulder, CO, USA / 8:30 am08:30 PST

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
Boulder, CO, USAPST
11:00pm previous day PDT UTC-7
12:00am PDT UTC-7
1:00am
2:00am
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
23:00 previous day PDT UTC-7
00:00 PDT UTC-7
01:00
02:00
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

Boulder Time Zone and Facts

Time Zone

Abbreviation / Offset
MST – Mountain Standard Time, UTC-7 (now)
MDT – Mountain Daylight Time, UTC-6 (daylight saving time)
Daylight Saving Time Starts
123456789101112Sunday, March 14, 2027 at 2:00 amSunday, March 14, 2027 at 02:00: clocks go forward 1 hour to 3:00 am03:00 (MDT). DST starts on the 2nd Sunday of March each year. Also called Spring Forward or Summer Time.
Daylight Saving Time Ends
123456789101112Sunday, November 7, 2027 at 2:00 amSunday, November 7, 2027 at 02:00: clocks go back 1 hour to 1:00 am01:00 (MST). DST ends on the 1st Sunday of November each year. Also called Fall Back or Winter Time.
Clock Changes
USA daylight saving time · Clock changes worldwide

Boulder Facts

Country
USA
State
Colorado
Alternative Names
Bolder, Boulder, Bouldur, WBU, ba'uldara, bo de, boldara, bolde xr, boldeo, boruda, bwldr, bwldr klradw, Болдер, Боулдер, Боулдър, בולדר, بولدر, بولدر، کلرادو, بولڈر، کولوراڈو, बाउल्डर, बोल्डर, โบลเดอร์, ボルダー, 波德, 볼더
Population
106,803
Currency
Dollar (USD)
Geographic Coordinates
40° 00' N Latitude / 105° 16' W Longitude
International Dialing Code
+1
More About Boulder
Boulder local time and city facts

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 all shaded areas are on PST.

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).

123456789101112Start: Pacific Standard Time (PST) started 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. Standard time starts annually on the first Sunday of November.

123456789101112End: Pacific Standard Time (PST) ends 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 local daylight time instead. Standard time ends annually on the second Sunday of March.

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