JST to CDT
-14hJST
JSTSOURCECDT
CDTGreen rows indicate typical business hours (9 AM - 5 PM)
JST and CDT on the World Map
The map below highlights the JST (Japan Standard Time) and CDT (Central Daylight Time) timezone regions across the globe.
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.
CDT – Central Daylight Time
UTC-05:00Central Daylight Time (CDT) is the daylight saving offset in the Central Time Zone, 5 hours behind UTC.
- •CDT is the same offset as EST (UTC-05:00), which can cause confusion.
- •CDT runs from the second Sunday in March to the first Sunday in November.
Time Conversion Guide: JST to CDT
JST runs on Japan Standard Time (JST) at UTC+09:00. CDT runs on Central Daylight Time (CDT) at UTC-05:00. That puts JST 14 hours behind CDT — a difference of -14h at the current offsets.
In practice, when it is 9:00 AM in JST it is 7:00 PM in CDT on the previous day. Midnight in JST is 10:00 AM in CDT. Neither zone observes daylight saving time, so the offset between them stays constant all year.
JST to CDT time conversion table
| JST (JST) | CDT (CDT) | Day |
|---|---|---|
| 12:00 AM | 10:00 AM | previous day |
| 6:00 AM | 4:00 PM | previous day |
| 7:00 AM | 5:00 PM | previous day |
| 8:00 AM | 6:00 PM | previous day |
| 9:00 AM | 7:00 PM | previous day |
| 12:00 PM | 10:00 PM | previous day |
| 3:00 PM | 1:00 AM | same day |
| 5:00 PM | 3:00 AM | same day |
| 6:00 PM | 4:00 AM | same day |
| 9:00 PM | 7:00 AM | same day |
Why people convert JST to CDT time
- Scheduling a call from JST to CDT: a 10:00 AM start in JST lands at 8:00 PM in CDT the previous day, so you can confirm the slot without doing the arithmetic yourself.
- Handling a -14h gap: JST and CDT 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 CDT is 7:00 PM in JST.
- Watching a live event or market open: JST viewers need 7:00 PM in CDT to catch a 9:00 AM start there, and 2:00 PM if the event is anchored to JST.
- Always state the zone abbreviation, not just the hour. "3:00 PM JST" is unambiguous; "3 PM" across a -14h gap is not.
- With a -14h gap there is no shared 9-to-5 window, so alternate the early start: one week JST takes the early slot, the next week CDT does.
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.
About CDT (Central Daylight Time)
Central Daylight Time (CDT) is observed during summer months in the US and Canadian portions of the Central Time Zone. Clocks are moved forward by one hour, aligning with Eastern Standard Time (EST). Most of Mexico and Central America do not observe CDT, staying on CST year-round.
Best time to call between JST and CDT
With a -14h offset there is no overlap inside a normal 9 AM – 5 PM day. CDT opens at 9:00 AM CDT, which is 7:00 PM in JST, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
JST and CDT have no shared working hours because of the -14h gap. Teams need to alternate early starts or rely on asynchronous handovers.
JST is 14 hours behind CDT (JST UTC+09:00 → CDT UTC-05:00). 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
JST
Does not observe DST
CDT
☀ Currently in DST
Standard: UTC-06:00 · DST: UTC-05:00
Clocks fall back on Sun, Nov 1, 2026
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 JST and CDT?
JST (JST, UTC+09:00) is 14 hours behind CDT (CDT, UTC-05:00). The gap is currently -14h.
How do I convert JST time to CDT time?
Add -14h to JST local time. For example, 9:00 AM in JST is 7:00 PM in CDT (previous day).
What time is it in CDT right now?
CDT uses CDT at UTC-05:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -14h offset from JST.
What is the best time to call CDT from JST?
There is no shared working-hours window because of the -14h gap. The closest option is 1:00 PM in JST, which is 11:00 PM in CDT.
Which is behind, JST or CDT?
JST is 14 hours behind CDT. When it is 12:00 PM in JST it is 10:00 PM in CDT.
Does daylight saving time affect the JST–CDT difference?
Neither zone observes daylight saving time, so the -14h offset between JST and CDT is fixed all year.
Which other cities share JST's time zone?
JST also covers Tokyo, Osaka, Yokohama, Nagoya, Sapporo, Kyoto, Kobe, Fukuoka and 1 more.
Which countries use JST, JST's zone?
JST is used in Japan.
Is there a day difference between JST and CDT?
Sometimes. The -14h gap is large enough that 8:00 PM or later in JST already falls on the in CDT.
What is the time difference between JST and CDT?
CDT is -14h from JST.
What timezone is JST in?
JST operates on its local timezone.
What timezone is CDT in?
CDT operates on its local timezone.
Which countries use JST (Japan Standard Time)?
JST is used in Japan.
Does JST observe daylight saving time?
No, JST does not observe daylight saving time and remains at UTC+09:00 year-round.
What are some interesting facts about JST?
Japan does not observe daylight saving time. Tokyo is the most populous metropolitan area in the world.
Which cities are in the CDT timezone?
Major cities in the CDT timezone include Chicago, Houston, Dallas, Austin, Winnipeg, Nashville.
What is the UTC offset for CDT?
Central Daylight Time (CDT) is at UTC-05:00. During daylight saving time, it shifts to CST.
What should I know about the CDT timezone?
CDT is the same offset as EST (UTC-05:00), which can cause confusion. CDT runs from the second Sunday in March to the first Sunday in November.
When is it midnight in JST, what time is it in CDT?
When it is 12:00 AM (midnight) in JST (JST), it is -14h later in CDT (CDT).
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See every conversion from JST →·See every conversion from CDT →