JST to EST Converter

Category: Time Zone Converters

- June 15, 2025

| |

Japan Standard Time (JST)

UTC+9 • Tokyo, Osaka, Kyoto

Conversion Settings

Configure your timezone conversion preferences

Auto Convert

Daylight Saving Aware

Show UTC Offset

Eastern Standard Time (EST/EDT)

UTC-5/-4 • New York, Toronto, Miami

--:--:--

Select a time to convert

Time Difference: --

UTC Offset (JST): +09:00

UTC Offset (EST): -05:00

DST Status: --

JST Time: --

EST/EDT Time: --

Time Format:

Current JST: 4:44:16 PM

Current EST: 2:44:16 PM

🌏 JST is always UTC+9. EST changes to EDT (UTC-4) during daylight saving time.

JST to EST Conversion Guide

What is JST to EST Conversion?

JST to EST conversion helps you translate time between Japan Standard Time and Eastern Standard Time zones. JST is UTC+9 and never changes for daylight saving time. EST is UTC-5 in winter and becomes EDT (UTC-4) during daylight saving time from March to November.

Time Zone Information

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

Eastern Standard Time (EST): Used in Eastern US and Canada including New York, Toronto, and Miami. UTC-5 in winter, becomes EDT (UTC-4) during daylight saving.

Time Difference: JST is typically 14 hours ahead of EST, or 13 hours ahead of EDT during daylight saving time.

Daylight Saving Time Impact

Winter Period (EST): November to March - JST is 14 hours ahead of EST

Summer Period (EDT): March to November - JST is 13 hours ahead of EDT

Japan Time: No daylight saving time changes - always UTC+9 year-round

Common Conversion Examples

Business Hours (Winter)

JST 9:00 AM → EST 7:00 PM (previous day)

JST 6:00 PM → EST 4:00 AM

14 hour time difference during EST period

Business Hours (Summer)

JST 9:00 AM → EDT 8:00 PM (previous day)

JST 6:00 PM → EDT 5:00 AM

13 hour time difference during EDT period

Meeting Planning

Best JST Time: 10:00 PM - 11:00 PM

Converts to EST: 8:00 AM - 9:00 AM

Optimal for both business hours

Event Scheduling

JST Midnight: Noon EST (previous day)

JST Noon: Midnight EST

Perfect for global event timing

Conversion Tips & Best Practices

• Always check if Eastern Time is observing EST or EDT when scheduling

• JST doesn't change - it's always 9 hours ahead of UTC throughout the year

• Business meetings work best when JST is in evening (8-11 PM) for EST morning hours

• Remember that dates change across the conversion - JST is often a day ahead

• Use 24-hour format to avoid AM/PM confusion when scheduling internationally

• EST transitions to EDT on the second Sunday in March at 2:00 AM

Convert Between JST and EST

Time differences can trip up even the most seasoned traveler or remote worker. If you're juggling schedules across Japan and the Eastern US or Canada, this JST-EST time converter makes the job a lot simpler. Whether you're planning a meeting, checking in with a friend, or tracking a launch window, it gives you a clear picture of what time it really is on the other side of the world.

Two Timezones, One Easy Tool

This tool focuses on two major zones: Japan Standard Time (JST) and Eastern Time (EST/EDT). You choose a time in either zone, and it shows you the corresponding time on the other side. The tool accounts for daylight saving time automatically (if you leave the setting on), so you don’t have to keep track of seasonal shifts in the US.

It’s not just a simple converter either. It comes with extras like auto-updating live clocks for both zones, format switching between 12 and 24-hour time, and clear indicators about which time standard (EST or EDT) is active.

Start Here: How to Convert Time

Step-by-step walkthrough

Pick your input time using the date and time selector.
Choose which timezone you're starting from: JST or EST/EDT.
By default, the conversion happens automatically. If you’ve turned that off, just click “Convert Time.”
Check the converted time in the output section, along with the date, formatted display, and UTC offset.

Need to flip things around? Just click the “Swap” button. The tool will reverse the direction of the conversion and update all labels to match.

Smart Features That Help You Plan Better

Time awareness settings

Auto Convert: Leave this on and your results update as soon as you change the input time.
Daylight Saving Aware: When this is checked (on by default), the tool correctly adjusts for EDT during the summer months in the US.
Show UTC Offset: Switch this on if you prefer to see full offsets like “UTC+09:00” instead of shorthand “+9.”

Quick actions at your fingertips

Convert: Manually run the conversion if Auto Convert is off.
Swap: Flip the input and output zones instantly.
Now: Sets the current time in the selected timezone as your input.
Reset: Clears all selections and puts the tool back to JST input by default.
Format Toggle: Use this to switch between 12-hour (AM/PM) and 24-hour clock styles.

Live clocks keep you in sync

At the bottom of the tool, you’ll see current time ticking live for both JST and EST/EDT. It’s handy when you just need a quick glance at what time it is right now in Tokyo or New York.

A Few Things to Keep in Mind

If you’re converting to or from EST, check whether it’s winter or summer. The tool does it for you, but it helps to know that EDT kicks in from March to November.
JST doesn’t observe daylight saving time—it's always UTC+9. That makes it a stable anchor for scheduling.
The date may shift when converting—especially when the time crosses midnight between zones. The tool shows both date and time clearly to avoid confusion.
Use 24-hour mode when clarity matters. No second-guessing AM or PM.

Time Zones Shouldn’t Get in Your Way

Whether you're coordinating across continents or trying to catch a game that airs overseas, this converter makes it easier to stay on track. It’s built to reduce errors, save back-and-forth messages, and help you stay in sync without the mental math. Just pick a time and go from there.