EDT to Osaka
+13hEDT
EDTSOURCEOsaka
JSTGreen rows indicate typical business hours (9 AM - 5 PM)
EDT and JST on the World Map
The map below highlights the EDT (Eastern Daylight Time) and JST (Japan Standard Time) timezone regions across the globe.
EDT – Eastern Daylight Time
UTC-04:00Eastern Daylight Time (EDT) is the daylight saving time observed in the Eastern Time Zone, 4 hours behind UTC.
- •EDT is observed from the second Sunday of March to the first Sunday of November.
- •During EDT, the US East Coast is only 4 hours behind London (instead of 5).
- •Not all EST locations switch to EDT – Panama and Jamaica stay on EST year-round.
JST – Japan Standard Time
UTC+09:00Japan Standard Time (JST) is the time zone for Japan, 9 hours ahead of UTC.
- •Japan does not observe daylight saving time.
- •Tokyo is the most populous metropolitan area in the world.
- •The Tokyo Stock Exchange operates from 9:00 AM to 3:00 PM JST.
- •JST is 14 hours ahead of EST and 9 hours ahead of GMT.
About Osaka
WikipediaOsaka operates on Japan Standard Time (JST), UTC+9. As Japan's second economic center and a manufacturing hub, Osaka shares business hours with Tokyo.
Osaka Castle was originally built in 1583 and has been rebuilt several times.
Understanding the +13h Gap: EDT vs Osaka
EDT runs on Eastern Daylight Time (EDT) at UTC-04:00. Osaka runs on Japan Standard Time (JST) at UTC+09:00. That puts EDT 13 hours ahead of Osaka — a difference of +13h at the current offsets.
In practice, when it is 9:00 AM in EDT it is 10:00 PM in Osaka. Midnight in EDT is 1:00 PM in Osaka. Neither zone observes daylight saving time, so the offset between them stays constant all year.
EDT to Osaka time conversion table
| EDT (EDT) | Osaka (JST) | Day |
|---|---|---|
| 12:00 AM | 1:00 PM | same day |
| 6:00 AM | 7:00 PM | same day |
| 7:00 AM | 8:00 PM | same day |
| 8:00 AM | 9:00 PM | same day |
| 9:00 AM | 10:00 PM | same day |
| 12:00 PM | 1:00 AM | next day |
| 3:00 PM | 4:00 AM | next day |
| 5:00 PM | 6:00 AM | next day |
| 6:00 PM | 7:00 AM | next day |
| 9:00 PM | 10:00 AM | next day |
Why people convert EDT to Osaka time
- Scheduling a call from EDT to Osaka: a 10:00 AM start in EDT lands at 11:00 PM in Osaka, so you can confirm the slot without doing the arithmetic yourself.
- Handling a +13h gap: EDT and Osaka have no overlap inside a normal 9-to-5 day, so real-time meetings need an early-morning or late-evening slot on one side. 9:00 AM in Osaka is 10:00 PM in EDT.
- Watching a live event or market open: EDT viewers need 10:00 PM in Osaka to catch a 9:00 AM start there, and 11:00 AM if the event is anchored to EDT.
- Always state the zone abbreviation, not just the hour. "3:00 PM EDT" is unambiguous; "3 PM" across a +13h gap is not.
- With a +13h gap there is no shared 9-to-5 window, so alternate the early start: one week EDT takes the early slot, the next week Osaka does.
About EDT (Eastern Daylight Time)
Eastern Daylight Time (EDT) is used during the summer months (second Sunday of March to the first Sunday of November) in the Eastern Time Zone. During EDT, clocks are advanced by one hour to take advantage of longer daylight hours. Not all locations in the Eastern Time Zone observe DST – Panama, Jamaica, and most of the Caribbean remain on EST year-round.
About JST (Japan Standard Time)
Japan Standard Time (JST) is the standard time zone for all of Japan. Japan does not observe daylight saving time. JST is 9 hours ahead of UTC and 14 hours ahead of EST. The Tokyo Stock Exchange, the world's third largest by market capitalization, operates on JST. South Korea uses the same offset (KST) but it is a distinct time zone.
Best time to call between EDT and Osaka
With a +13h offset there is no overlap inside a normal 9 AM – 5 PM day. Osaka opens at 9:00 AM JST, which is 10:00 PM in EDT, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
EDT and Osaka have no shared working hours because of the +13h gap. Teams need to alternate early starts or rely on asynchronous handovers.
EDT is 13 hours ahead of Osaka (EDT UTC-04:00 → JST UTC+09:00). There is no shared 9-to-5 window, so plan around an early or late slot. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
EDT
☀ Currently in DST
Standard: UTC-05:00 · DST: UTC-04:00
Clocks fall back on Sun, Nov 1, 2026
Osaka
Does not observe DST
Learn More About Time
Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:
Frequently Asked Questions
What is the time difference between EDT and Osaka?
EDT (EDT, UTC-04:00) is 13 hours ahead of Osaka (JST, UTC+09:00). The gap is currently +13h.
How do I convert EDT time to Osaka time?
Add +13h to EDT local time. For example, 9:00 AM in EDT is 10:00 PM in Osaka.
What time is it in Osaka right now?
Osaka uses JST at UTC+09:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +13h offset from EDT.
What is the best time to call Osaka from EDT?
There is no shared working-hours window because of the +13h gap. The closest option is 1:00 PM in EDT, which is 2:00 AM in Osaka.
Which is ahead, EDT or Osaka?
EDT is 13 hours ahead of Osaka. When it is 12:00 PM in EDT it is 1:00 AM in Osaka.
Do EDT and Osaka use different time zones?
EDT uses EDT at UTC-04:00, while Osaka (Japan) uses JST at UTC+09:00. The IANA identifiers are America/New_York and Asia/Tokyo.
Does daylight saving time affect the EDT–Osaka difference?
Neither zone observes daylight saving time, so the +13h offset between EDT and Osaka is fixed all year.
Which other cities share EDT's time zone?
EDT also covers New York City, Washington D.C., Toronto, Miami, Philadelphia, Atlanta, Boston, Montreal.
Which countries use EDT, EDT's zone?
EDT is used in United States (Eastern), Canada (Ontario, Quebec), Bahamas, Haiti, Turks and Caicos.
Is there a day difference between EDT and Osaka?
Sometimes. The +13h gap is large enough that 8:00 PM or later in EDT already falls on the next day in Osaka.
What is the time difference between EDT and Osaka?
Osaka is +13h from EDT.
What timezone is EDT in?
EDT operates on its local timezone.
What timezone is Osaka in?
Osaka operates on Japan Standard Time (JST), UTC+9. As Japan's second economic center and a manufacturing hub, Osaka shares business hours with Tokyo.
What are the business hours in Osaka?
Standard business hours in Osaka are 9:00 AM - 6:00 PM JST.
Which countries use EDT (Eastern Daylight Time)?
EDT is used in United States (Eastern), Canada (Ontario, Quebec), Bahamas, Haiti, Turks and Caicos.
Does EDT observe daylight saving time?
Yes, EDT switches to EST during summer months.
What are some interesting facts about EDT?
EDT is observed from the second Sunday of March to the first Sunday of November. During EDT, the US East Coast is only 4 hours behind London (instead of 5).
Which cities are in the JST timezone?
Major cities in the JST timezone include Tokyo, Osaka, Yokohama, Nagoya, Sapporo, Kyoto, Kobe, Fukuoka.
What is the UTC offset for JST?
Japan Standard Time (JST) is at UTC+09:00.
What should I know about the JST timezone?
Japan does not observe daylight saving time. Tokyo is the most populous metropolitan area in the world.
When is it midnight in EDT, what time is it in Osaka?
When it is 12:00 AM (midnight) in EDT (EDT), it is +13h later in Osaka (JST).
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