12 AM JST ⟷ EST Time Converter
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Time Difference
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Quick Reference
12 AM JST
→ 10 AM EST (previous day)
9 AM JST
→ 7 PM EST (previous day)
5 PM JST
→ 3 AM EST
Meeting Planner
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World Clock
Tokyo (JST)
New York (EST/EDT)
London (GMT/BST)
Los Angeles (PST/PDT)
Understanding JST to EST Time Conversion
Time Zone Basics
Japan Standard Time (JST) is UTC+9, while Eastern Standard Time (EST) is UTC-5. This creates a 14-hour difference between the two time zones. During Daylight Saving Time, Eastern Daylight Time (EDT) is UTC-4, making the difference 13 hours.
JST (Japan Standard Time)
UTC+9, no daylight saving time
EST/EDT (Eastern Standard/Daylight Time)
EST: UTC-5 (winter), EDT: UTC-4 (summer)
Common Conversion Examples
JST (Japan)
EST/EDT (Eastern US)
12:00 AM (Midnight)
10:00 AM (Previous day)
9:00 AM
7:00 PM (Previous day)
12:00 PM (Noon)
10:00 PM (Previous day)
5:00 PM
3:00 AM (Same day)
8:00 PM
6:00 AM (Same day)
Tips for International Communication
1
Use 24-hour format
When scheduling international meetings, use the 24-hour format to avoid AM/PM confusion.
2
Specify the time zone
Always include the time zone abbreviation (JST, EST, EDT) when communicating times.
3
Consider working hours
Typical business hours in Japan are 9 AM to 6 PM JST, which is 7 PM to 4 AM EST (previous day).
4
Be aware of date changes
Remember that when it's morning in Japan, it's still the previous day in the Eastern US.