Does it account for Daylight Saving Time?

Yes, our converter uses the IANA timezone database, which includes all current DST rules for every timezone in the world.

UTC (Coordinated Universal Time) is the primary time standard by which the world regulates clocks. All timezones are defined as offsets from UTC.

Can I compare multiple timezones at once?

Yes, you can add multiple cities or timezones and see the equivalent times side by side.

How many timezones are there in the world?

There are 38 distinct UTC offsets in use, ranging from UTC-12 to UTC+14. This includes half-hour (UTC+5:30 India, UTC+9:30 Australia) and 45-minute offsets (UTC+5:45 Nepal, UTC+8:45 Australia).

What is the International Date Line?

The International Date Line (IDL) runs roughly along the 180° meridian in the Pacific Ocean. When you cross it westward, you gain a day; crossing eastward, you lose a day.

Why do some timezones have 30 or 45 minute offsets?

Countries chose offsets that best matched their solar noon. India uses UTC+5:30 and Nepal uses UTC+5:45 because standard hourly offsets didn't align well with their geography.

Which country has the most timezones?

France has the most (12 timezones) due to overseas territories. Russia spans 11 timezones. The US has 6 (including Hawaii and Alaska).

Osaka to Santiago

-12h

Osaka

JSTSOURCE

Japan · UTC+09:00

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Santiago

CLST

Chile · UTC-03:00☀ DST active

HH12

MM00

00:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

Osaka

Santiago

12:00 AM

12:00 PM-1

2:00 AM

2:00 PM-1

4:00 AM

4:00 PM-1

6:00 AM

6:00 PM-1

8:00 AM

8:00 PM-1

10:00 AM

10:00 PM-1

12:00 PM

12:00 AM

2:00 PM

2:00 AM

4:00 PM

4:00 AM

6:00 PM

6:00 AM

8:00 PM

8:00 AM

10:00 PM

10:00 AM

Green rows indicate typical business hours (9 AM - 5 PM)

JST and CLST on the World Map

The map below highlights the JST (Japan Standard Time) and CLST (Chile Standard Time) timezone regions across the globe.

JST Zone

→

CLST Zone

Explore all world timezones interactively →

JST – Japan Standard Time

UTC+09:00

Japan Standard Time (JST) is the time zone for Japan, 9 hours ahead of UTC.

Countries in JST

Japan

Major Cities in JST

TokyoOsakaYokohamaNagoyaSapporoKyotoKobeFukuokaHiroshima

Key Facts about JST

•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.

Daylight Saving:No – UTC+09:00 year-round

Learn more about JST on Wikipedia

CLT – Chile Standard Time

UTC-04:00

Chile Standard Time (CLT) is the time zone for continental Chile, 4 hours behind UTC.

Countries in CLT

Chile

Major Cities in CLT

SantiagoValparaísoConcepciónViña del MarAntofagasta

Key Facts about CLT

•Chile observes daylight saving time, switching to CLST (UTC-03:00) in summer.
•Santiago is the largest city in Chile with over 6 million in the metro area.
•Chile spans over 4,300 km from north to south but uses one timezone.

Daylight Saving:Yes – switches to CLST

Learn more about CLT on Wikipedia

About Osaka

Wikipedia

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.

Population:2.8 million

Metro:19 million

Business Hours:9:00 AM - 6:00 PM JST

Currency:JPY (¥)

Stock Exchange:OSE (Osaka Exchange - derivatives)

Key Landmarks

Osaka CastleDotonboriUniversal Studios JapanShitennoji TempleUmeda Sky Building

Did You Know?

Osaka Castle was originally built in 1583 and has been rebuilt several times.

Learn more about JST timezone →

Osaka to Santiago Time Difference – Complete Guide

Osaka runs on Japan Standard Time (JST) at UTC+09:00. Santiago runs on Chile Summer Time (CLST) at UTC-03:00, also currently on daylight saving time. That puts Osaka 12 hours behind Santiago — a difference of -12h at the current offsets.

In practice, when it is 9:00 AM in Osaka it is 9:00 PM in Santiago on the previous day. Midnight in Osaka is 12:00 PM in Santiago.Santiago observes daylight saving time while Osaka does not, so the gap narrows or widens by an hour part of the year.

Osaka to Santiago time conversion table

Osaka (JST)	Santiago (CLST)	Day
12:00 AM	12:00 PM	previous day
6:00 AM	6:00 PM	previous day
7:00 AM	7:00 PM	previous day
8:00 AM	8:00 PM	previous day
9:00 AM	9:00 PM	previous day
12:00 PM	12:00 AM	same day
3:00 PM	3:00 AM	same day
5:00 PM	5:00 AM	same day
6:00 PM	6:00 AM	same day
9:00 PM	9:00 AM	same day

Why people convert Osaka to Santiago time

Scheduling a call from Osaka to Santiago: a 10:00 AM start in Osaka lands at 10:00 PM in Santiago the previous day, so you can confirm the slot without doing the arithmetic yourself.
Handling a -12h gap: Osaka and Santiago 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 Santiago is 9:00 PM in Osaka.
Watching a live event or market open: Osaka viewers need 9:00 PM in Santiago to catch a 9:00 AM start there, and 12:00 PM if the event is anchored to Osaka.

Always state the zone abbreviation, not just the hour. "3:00 PM JST" is unambiguous; "3 PM" across a -12h gap is not.
With a -12h gap there is no shared 9-to-5 window, so alternate the early start: one week Osaka takes the early slot, the next week Santiago does.
Santiago: Clocks fall back on Sun, Apr 4, 2027. Any meeting series spanning that date will shift by an hour in local time.

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 CLT (Chile Standard Time)

Chile Standard Time (CLT) is the standard time in Chile. During summer months (October to March), Chile switches to Chile Summer Time (CLST, UTC-03:00). Chile is the longest north-south country in the world.

Best time to call between Osaka and Santiago

With a -12h offset there is no overlap inside a normal 9 AM – 5 PM day. Santiago opens at 9:00 AM CLST, which is 9:00 PM in Osaka, so real-time calls need an early-morning or late-evening slot on one side.

Business hours overlap

Osaka and Santiago have no shared working hours because of the -12h gap. Teams need to alternate early starts or rely on asynchronous handovers.

Osaka is 12 hours behind Santiago (JST UTC+09:00 → CLST UTC-03:00). 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

Osaka

Does not observe DST

Santiago

☀ Currently in DST

Standard: UTC-04:00 · DST: UTC-03:00

Clocks fall back on Sun, Apr 4, 2027

Learn More About Time

Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:

⏳

History of Timekeeping

From sundials to atomic clocks - 5000 years of measuring time

🌍

How Time Zones Work

UTC, offsets, and why zones don't follow straight lines

☀️

Daylight Saving Time

DST dates, which countries observe it, and the ongoing debate

Frequently Asked Questions

What is the time difference between Osaka and Santiago?

Osaka (JST, UTC+09:00) is 12 hours behind Santiago (CLST, UTC-03:00). The gap is currently -12h.

How do I convert Osaka time to Santiago time?

Add -12h to Osaka local time. For example, 9:00 AM in Osaka is 9:00 PM in Santiago (previous day).

What time is it in Santiago right now?

Santiago uses CLST at UTC-03:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -12h offset from Osaka.

What is the best time to call Santiago from Osaka?

There is no shared working-hours window because of the -12h gap. The closest option is 1:00 PM in Osaka, which is 1:00 AM in Santiago.

Which is behind, Osaka or Santiago?

Osaka is 12 hours behind Santiago. When it is 12:00 PM in Osaka it is 12:00 AM in Santiago.

Do Osaka and Santiago use different time zones?

Osaka (Japan) uses JST at UTC+09:00, while Santiago (Chile) uses CLST at UTC-03:00. The IANA identifiers are Asia/Tokyo and America/Santiago.

Does daylight saving time affect the Osaka–Santiago difference?

Yes at the moment: Santiago is on daylight saving time and Osaka is not, so the -12h gap shifts by an hour when exactly one of them changes clocks.

Which other cities share Osaka's time zone?

JST also covers Tokyo, Osaka, Yokohama, Nagoya, Sapporo, Kyoto, Kobe, Fukuoka and 1 more.

Which countries use JST, Osaka's zone?

JST is used in Japan.

Is there a day difference between Osaka and Santiago?

Sometimes. The -12h gap is large enough that 8:00 PM or later in Osaka already falls on the in Santiago.

What is the time difference between Osaka and Santiago?

Santiago is -12h from Osaka.

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 timezone is Santiago in?

Santiago operates on its local timezone.

What are the business hours in Osaka?

Standard business hours in Osaka are 9:00 AM - 6:00 PM JST.

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 CLT timezone?

Major cities in the CLT timezone include Santiago, Valparaíso, Concepción, Viña del Mar, Antofagasta.

What is the UTC offset for CLT?

Chile Standard Time (CLT) is at UTC-04:00. During daylight saving time, it shifts to CLST.

What should I know about the CLT timezone?

Chile observes daylight saving time, switching to CLST (UTC-03:00) in summer. Santiago is the largest city in Chile with over 6 million in the metro area.