PDT to JST Converter

Category: Time Zone Converters

- July 04, 2025

| |

Pacific Daylight Time (PDT)

UTC-7/-8 • Los Angeles, Seattle, Vancouver

Conversion Settings

Configure your timezone conversion preferences

Auto Convert

Daylight Saving Aware

Show UTC Offset

Show Seconds

Japan Standard Time (JST)

UTC+9 • Tokyo, Osaka, Yokohama

--:--:--

Select a time to convert

Time Difference: --

UTC Offset (PDT): -7

UTC Offset (JST): +9

DST Status: --

PDT Time: --

JST Time: --

Time Format:

Current PDT: --:--:--

Current JST: --:--:--

🌏 Pacific Time switches between PDT (UTC-7) and PST (UTC-8). JST is UTC+9 year-round. Time difference varies: 16 hours (PDT) or 17 hours (PST).

PDT to JST Conversion Guide

What is PDT to JST Conversion?

PDT to JST conversion helps you translate time between Pacific Daylight Time and Japan Standard Time. Pacific Time switches between PDT (UTC-7) in summer and PST (UTC-8) in winter, while JST remains UTC+9 year-round. The time difference varies seasonally: JST is 16 hours ahead during PDT and 17 hours ahead during PST.

Time Zone Information

Pacific Time (PT): Used in western North America including Los Angeles, Seattle, and Vancouver. Switches between PDT (UTC-7) and PST (UTC-8) with daylight saving time.

Japan Standard Time (JST): Used throughout Japan including Tokyo, Osaka, and Yokohama. Always UTC+9 with no daylight saving adjustments.

Variable Difference: JST is 16 hours ahead during PDT period (summer) and 17 hours ahead during PST period (winter).

Daylight Saving Time Impact

Pacific Time Changes: Pacific Time observes daylight saving from March to November, switching between PDT and PST

JST Consistency: Japan does not observe daylight saving time, so JST remains UTC+9 throughout the year

Seasonal Variation: The time difference changes by 1 hour when Pacific Time transitions between PDT and PST

Common Conversion Examples

Summer Period (PDT)

PDT 9:00 AM → JST 1:00 AM (next day)

PDT 5:00 PM → JST 9:00 AM (next day)

16-hour difference during daylight time

Winter Period (PST)

PST 9:00 AM → JST 2:00 AM (next day)

PST 5:00 PM → JST 10:00 AM (next day)

17-hour difference during standard time

Business Coordination

PDT 6:00 AM → JST 10:00 PM

PDT 7:00 AM → JST 11:00 PM

Early morning PDT = Late evening JST

Gaming & Entertainment

PDT 8:00 PM → JST 12:00 PM (next day)

PDT 11:00 PM → JST 3:00 PM (next day)

Evening PDT = Afternoon JST (next day)

Conversion Tips & Best Practices

• JST is 16 hours ahead of PDT (summer) and 17 hours ahead of PST (winter)

• Japan never observes daylight saving time, keeping JST constant year-round

• Pacific Time changes twice yearly, affecting the time difference with Japan

• JST dates typically change when converting from Pacific times due to crossing international date line

• Business hour overlap is minimal: early morning PDT coincides with late evening JST

• Consider seasonal time difference changes when scheduling recurring meetings

Convert Time From Pacific to Tokyo Time

If you've ever tried to set up a meeting or plan a gaming session between California and Japan, you know it can get confusing fast. That's where this tool comes in. Whether you're in Los Angeles checking when to call someone in Tokyo, or you work with teams across the Pacific, this quick converter does the math for you, accurately and instantly.

PDT/PST (Pacific Time)	JST (Japan Standard Time)
🇺🇸 United States 🇨🇦 Canada 🇲🇽 Mexico	🇯🇵 Japan

What the converter actually does behind the scenes

This calculator takes a time and date you enter from either Pacific Time (PDT/PST) or Japan Standard Time (JST), and converts it instantly to the other. It factors in whether daylight saving time is active and gives you precise results for both the time and the day. You can view the time difference, UTC offsets, and even format the output in either 12-hour or 24-hour mode.

Why use this tool?

Manual conversions between Pacific and Japan time aren't just annoying; they’re easy to mess up. And when you factor in daylight saving changes, the margin for error only grows. This tool handles all that automatically. It's perfect if you're scheduling remote meetings, managing project deadlines, streaming, gaming with friends in Japan, or just trying to catch a live event at the right moment.

How to use it without getting tripped up

1. Choose your starting timezone

By default, the calculator starts with Pacific Daylight Time. If you're entering a time from Japan instead, click the “Swap” button and it will flip everything; labels, dropdowns, and calculations.

2. Set your date and time

Use the calendar and clock input to enter the time you want to convert. You can type it in or use the built-in pickers.

3. Adjust the settings if needed

There are several checkboxes for extra control:

Auto Convert - Updates your result live as you change inputs.
Daylight Saving Aware - Keeps the Pacific Time shift between PDT and PST accurate.
Show UTC Offset - Displays each zone's UTC offset, like -7 or +9.
Show Seconds - Adds seconds to the time display for precision timing.

4. Press Convert (or use keyboard shortcuts)

You can either hit the “Convert Time” button, or press Enter to run the conversion. Power users can also use:

S - Swap zones
N - Fill with current time
R - Reset the form
F - Switch between 12-hour and 24-hour format

Built-in smarts that keep everything accurate

Unlike basic converters, this tool checks if the selected date falls within daylight saving time in the US. If it does, it treats the Pacific time as PDT (UTC-7). If it doesn’t, it switches to PST (UTC-8). Japan doesn’t do daylight saving at all, so JST is always UTC+9. The difference between the two zones is either 16 or 17 hours depending on the season.

What might trip you up (and how to avoid it)

If you skip filling out both date and time, the converter won't run. Make sure both fields are set.
The time difference varies seasonally, don’t assume it’s always the same.
Swapping the zones updates the interface too. Keep an eye on which zone is currently active as input.
The JST day will often be one day ahead of Pacific Time, especially for evening hours in California.

A real-world example: Planning from the US to Japan

Let’s say you're in Canada and working on a joint research project with a university in Japan. You need to have weekly calls. Pacific Time shifts because of daylight saving rules, but your Japanese colleagues don’t deal with that. Use this tool to make sure your 4:00 PM Wednesday doesn't become their 5:00 AM Thursday. Just punch in the time, click convert, and you’ll always get the right match.

Stay ahead when Pacific and Japan meet

Whether you're handling client calls, launching a product, or just syncing with a friend across the world, timing matters. With this tool, you don’t have to think twice. It keeps things clean, simple, so you can stay focused on the moment, not the math.