PST to JST Converter
Convert time between Pacific Standard Time (PST) and Japan Standard Time (JST)
Pacific Standard Time (PST)
Japan Standard Time (JST)
Time Difference
Japan Standard Time (JST) is 0 hours ahead of Pacific Standard Time (PST)
Select Date
Select Time
Quick Reference
| PST | JST |
|---|---|
| 18:00 | 11:00 |
| 20:00 | 13:00 |
| 22:00 | 15:00 |
| 00:00 | 17:00 |
| 02:00 | 19:00 |
| 04:00 | 21:00 |
| 06:00 | 23:00 |
| 08:00 | 01:00 |
| 10:00 | 03:00 |
| 12:00 | 05:00 |
| 14:00 | 07:00 |
| 16:00 | 09:00 |
Top 10 Most Common Time Zones
| Abbreviation | Full Name | UTC Offset | Typical Use |
|---|---|---|---|
| UTC | Coordinated Universal Time | UTC ±0 | Global reference standard (servers, logs, APIs) |
| EST / EDT | Eastern (US) Time | UTC −5 / −4 | New York, Toronto — North American business hub |
| CST / CDT | Central (US) Time | UTC −6 / −5 | Chicago, Dallas — US central business region |
| PST / PDT | Pacific (US) Time | UTC −8 / −7 | San Francisco, Los Angeles — tech industry standard |
| GMT / BST | Greenwich Mean / British Summer Time | UTC 0 / +1 | UK, used globally as a reference with UTC |
| CET / CEST | Central European (Summer) Time | UTC +1 / +2 | Paris, Berlin, Amsterdam — EU business core |
| IST | India Standard Time | UTC +5:30 | India — major IT & outsourcing region |
| CST | China Standard Time | UTC +8 | Beijing, Shanghai — East Asia business hub |
| JST | Japan Standard Time | UTC +9 | Tokyo — finance & tech hub |
| AEST / AEDT | Australian Eastern (Daylight) Time | UTC +10 / +11 | Sydney, Melbourne — APAC regional business |
Why Time Zone Abbreviations Are Ambiguous
Unlike standardized identifiers (like America/New_York or Europe/London from the IANA tz database), abbreviations such as "CST" or "IST" are not globally unique. They can refer to different time zones depending on context — country, region, or even time of year (due to daylight saving time).
Common Ambiguous Time Zone Abbreviations
| Abbrev. | Common Meaning(s) | UTC Offset | Region(s) |
|---|---|---|---|
| CST | Central Standard Time / China Standard Time / Cuba Standard Time | UTC−6 / UTC+8 / UTC−5 | North America, China, Cuba |
| IST | Indian Standard Time / Irish Standard Time / Israel Standard Time | UTC+5:30 / UTC+1 / UTC+2 | India, Ireland, Israel |
| AST | Atlantic Standard Time / Arabia Standard Time | UTC−4 / UTC+3 | Caribbean, Canada, Middle East |
| PST | Pacific Standard Time / Philippine Standard Time | UTC−8 / UTC+8 | North America, Philippines |
| EST | Eastern Standard Time (North America / Australia) | UTC−5 / UTC+10 | North America, Australia |
✅ Best Practice
To avoid ambiguity, always:
- Use IANA tz identifiers — e.g.,
America/New_Yorkinstead of "EST" - Specify UTC offset explicitly — e.g.,
UTC−5when abbreviations must be used - Include the full timezone name — e.g., "Eastern Standard Time (EST)" with UTC offset
About PST to JST Time Conversion
Converting time between Pacific Standard Time (PST) and Japan Standard Time (JST) is essential for US West Coast to Japan coordination. PST is UTC-8 while JST is UTC+9, making JST 17 hours ahead of PST. The US West Coast observes daylight saving time, so the actual difference varies between 17 hours (when PST is active) and 16 hours (when PDT is active). Japan does not observe daylight saving time, so JST remains constant at UTC+9 year-round.
This conversion is crucial for business operations between the US West Coast and Japan. Whether you're scheduling international meetings between Silicon Valley and Tokyo, coordinating with Japanese business partners, managing customer service operations, or planning travel, our accurate IANA-based converter ensures precise timezone calculations accounting for seasonal daylight saving changes.
Common Use Cases for PST to JST Conversion
Business & Work
- Scheduling US West Coast to Japan business meetings
- Coordinating Silicon Valley and Tokyo tech operations
- Managing global business operations between US West Coast and Japan
Personal & Travel
- Planning travel from US West Coast to Japan
- Coordinating with Japanese family and friends from the US
- Scheduling virtual events for US-Japan audiences
Time Zone Information
Pacific Standard Time (PST)
- UTC Offset: UTC-8
- IANA Timezone: America/Los_Angeles
- Daylight Saving: Second Sunday in March to First Sunday in November
- Major Cities: Los Angeles, San Francisco, Seattle, Portland, San Diego
- Coverage: Pacific Coast of United States and Canada
Japan Standard Time (JST)
- UTC Offset: UTC+9
- IANA Timezone: Asia/Tokyo
- Daylight Saving: None - JST year-round (no daylight saving)
- Major Cities: Tokyo, Osaka, Kyoto, Nagoya, Yokohama
- Coverage: Entire Japan
Quick Reference: PST to JST
Remember: JST is always 17 hours ahead of PST, but becomes 16 hours when PDT is active (daylight saving time)
Frequently Asked Questions
What is the time difference between PST and JST?
Pacific Standard Time (PST) is UTC-8, while Japan Standard Time (JST) is UTC+9. JST is 17 hours ahead of PST. When it's 8:00 AM in PST, it's 1:00 AM the next day in JST.
Does Japan observe daylight saving time like PST does?
No, Japan does not observe daylight saving time. Japan Standard Time remains UTC+9 throughout the year. However, the US West Coast observes daylight saving time, transitioning from PST (UTC-8) to PDT (UTC-7) from mid-March to early November. This means the time difference varies between 17 hours (when PST is active) and 16 hours (when PDT is active).
What is the time difference during Pacific Daylight Time (PDT)?
When the US West Coast observes Pacific Daylight Time (PDT, UTC-7) from mid-March to early November, the difference becomes 16 hours. During this period, when it's 8:00 AM PDT, it would be 12:00 AM (midnight) JST the next day. This is why it's important to verify whether PST or PDT is currently active.
What major cities are in PST and JST timezones?
PST covers major US West Coast cities like Los Angeles, San Francisco, Seattle, Portland, and San Diego. JST covers major Japanese cities including Tokyo, Osaka, Kyoto, Nagoya, and Yokohama across the entire country.
How do I convert PST to JST manually?
To convert from PST to JST, add 17 hours to the PST time. For example, if it's 3:00 PM PST, add 17 hours to get 8:00 AM JST the next day. Remember that the difference becomes 16 hours when the US West Coast observes PDT (daylight saving time).
What are the best times to schedule calls between PST and JST?
The 17-hour difference creates limited overlap. PST morning (8-10 AM) corresponds to JST evening/night (1-3 AM next day). PST afternoon (2-4 PM) aligns with JST early morning (7-9 AM next day). Evening PST (6-8 PM) aligns with late morning JST (11 AM-1 PM next day), offering the best meeting window for both regions.
Pro Tips
- • JST is always 17 hours ahead of PST - but becomes 16 hours when PDT is active (March-November).
- • Japan does not observe daylight saving time, so JST remains UTC+9 year-round while the US West Coast changes seasonally.
- • Evening PST (6-8 PM) equals late morning JST (11 AM-1 PM next day), providing the best time overlap for business meetings.
- • PST morning (8-10 AM) equals very late night/early morning JST (1-3 AM next day), making synchronous meetings challenging unless Japanese partners work late.
- • Use 24-hour time format when communicating across PST-JST to eliminate AM/PM confusion and handle day transitions clearly.
- • Between March and November, remember the 16-hour difference when PST transitions to PDT due to US daylight saving time.