ChST to PST Converter

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ChST
Chamorro Standard Time
UTC+10
12am
3am
6am
9am
12pm
3pm
6pm
9pm
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)

Quick answers

Selected conversion

10:00 pm22:00 ChST (UTC+10), Oct 13, 2026 = 5:00 am05:00 PDT (UTC-7), Oct 13, 2026

ChST is 17 hours ahead of PDT.

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

These examples always use ChST (UTC+10) and PST (UTC-8). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.

ChST is 18 hours ahead of PST.

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. For Pacific Time that follows daylight saving time, use CHST to PT. For daylight-time examples, use CHST to PDT.

How the time difference changes

For most of the year, ChST is 17 hours ahead of PDT. From Nov 1, 2026 to Mar 14, 2027, ChST is 18 hours ahead of PST.

For most of the year, working hours of 9:00 am to 5:00 pm in ChST correspond to 4:00 pm (previous day) to 12:00 am in PDT. At other times of the year, working hours of 9:00 am to 5:00 pm in ChST correspond to 3:00 pm (previous day) to 11:00 pm (previous day) in PST.For most of the year, working hours of 09:00 to 17:00 in ChST correspond to 16:00 (previous day) to 00:00 in PDT. At other times of the year, working hours of 09:00 to 17:00 in ChST correspond to 15:00 (previous day) to 23:00 (previous day) in PST.

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

Time Difference

Chamorro Standard Time is 17 hours ahead of Pacific Daylight Time.
10:00 pm22:00 in ChST is 5:00 am05:00 in PDT

ChST to PDT call time
Best time for a conference call or a meeting is between 9am-10am09:00-10:00 in ChST which corresponds to 4pm-5pm16:00-17:00 in PDT (previous day)

10:00 pm22:00 Chamorro Standard Time (ChST). Offset UTC +10:00 hours
5:00 am05:00 Pacific Daylight Time (PDT). Offset UTC -7:00 hours

10:00 pm22:00 ChST / 5:00 am05:00 PDT

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
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Chamorro Standard Time

Offset: ChST is 10 hours ahead of Greenwich Mean Time (GMT).

Countries using this time zone: Guam, Northern Mariana Islands

Principal Cities: The largest city in the ChST time zone is Saipan in the Northern Mariana Islands, with about 48,220 people. Other major cities in this time zone include Dededo Village, Yigo Village, Tamuning-Tumon-Harmon Village, Mangilao Village.

Daylight Saving: Clocks in Chamorro Standard Time (ChST) do not change for daylight saving time, so ChST stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter; see upcoming clock changes worldwide.

Map of the areas on Chamorro Standard Time (ChST)
ChST all year

Open the world time zone map© OpenStreetMap

ChST representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +10 - basic short
  • +1000 - basic
  • +10:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +1000 - sign character (+) followed by a four digit time providing hours (10) and minutes (00) of the offset. Indicates an offset of ten hours to the east of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Kilo - Military abbreviation for ChST
  • K - short form of 'Kilo'
IANA/Olson: Reflects ChST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Pacific/Guam
  • Pacific/Saipan
Time zones with the GMT +10 offset:
  • AEST - Australian Eastern Standard Time
  • CHUT - Chuuk Time
  • ChST - Chamorro Standard Time
  • K - Kilo Time Zone
  • KDT - Korea Daylight Time
  • PGT - Papua New Guinea Time
  • VLAT - Vladivostok Time
  • YAKST - Yakutsk Summer Time
  • YAPT - Yap Time

Pacific Standard Time

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

Countries using this time zone: Canada, 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).

123456789101112End: 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.

123456789101112Start: 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 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
EST to ISTGMT to ESTPST to ESTEST to GMTPST to GMT