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JST
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PT/PDT
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Quick answers

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9:00 pm21:00 JST (UTC+9), Oct 12, 2026 = 5:00 am05:00 PDT (UTC-7), Oct 12, 2026

JST is 16 hours ahead of PDT.

How the time difference changes

For most of the year, JST is 16 hours ahead of PT. From Nov 1, 2026 to Mar 14, 2027, JST is 17 hours ahead of PT.

For most of the year, working hours of 9:00 am to 5:00 pm in JST correspond to 5:00 pm (previous day) to 1:00 am in PT. At other times of the year, working hours of 9:00 am to 5:00 pm in JST correspond to 4:00 pm (previous day) to 12:00 am in PT.For most of the year, working hours of 09:00 to 17:00 in JST correspond to 17:00 (previous day) to 01:00 in PT. At other times of the year, working hours of 09:00 to 17:00 in JST correspond to 16:00 (previous day) to 00:00 in PT.

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

Time Difference

Japan Standard Time is 16 hours ahead of Pacific Daylight Time.
9:00 pm21:00 in JST is 5:00 am05:00 in PDT

JST to PDT call time
Best time for a conference call or a meeting is between 8:30am-9:30am08:30-09:30 in JST which corresponds to 4:30pm-5:30pm16:30-17:30 in PDT (previous day). Their 9am–5pm09:00–17:00 working hours do not overlap; this is a suggested compromise.

9:00 pm21:00 Japan Standard Time (JST). Offset UTC +9:00 hours
5:00 am05:00 Pacific Daylight Time (PDT). Offset UTC -7:00 hours

9:00 pm21:00 JST / 5:00 am05:00 PDT

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Hourly time comparison
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Japan Standard Time

Offset: JST is 9 hours ahead of Greenwich Mean Time (GMT).

Countries using this time zone: Japan

Principal Cities: The largest city in the JST time zone is Tokyo in Japan, with about 9.733 million people. Other major cities in this time zone include Yokohama, Osaka, Nagoya, Sapporo.

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

JST representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +09 - basic short
  • +0900 - basic
  • +09:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +0900 - sign character (+) followed by a four digit time providing hours (09) and minutes (00) of the offset. Indicates an offset of nine hours to the east of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • India - Military abbreviation for JST
  • I - short form of 'India'
IANA/Olson: Reflects JST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Asia/Tokyo
  • Japan
Time zones with the GMT +9 offset:
  • AWDT - Australian Western Daylight Time
  • CHOST - Choibalsan Summer Time
  • I - India Time Zone
  • IRKST - Irkutsk Summer Time
  • JST - Japan Standard Time
  • KST - Korea Standard Time
  • PWT - Palau Time
  • TLT - East Timor Time
  • ULAST - Ulaanbaatar Summer Time
  • WIT - Eastern Indonesian Time
  • YAKT - Yakutsk Time

Pacific Time

Pacific Time (PT) is a general term used to describe the areas that observe either the Pacific Standard Time (PST) or Pacific Daylight Time (PDT) in the United States and Canada. PT also called Pacific Coast Time. PT is not static but switches between PDT and PST.

Territories observing the Pacific Time Zone are primarily in North America. It runs through the western part of Canada, the United States and the Northwestern part of Mexico.

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

Principal Cities: The largest city in the PT 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

PT 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 PT
  • U - short form of 'Uniform'
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