Does it handle Daylight Saving Time?

Yes, the tool automatically adjusts for Daylight Saving Time based on the specific date you select, ensuring accurate conversions year-round.

Can I add multiple cities?

Yes, you can add as many cities as you need to the dashboard to compare times across your entire global network simultaneously.

Edmonton to JST

+15h

Edmonton

MDTSOURCE

Canada · UTC-06:00☀ DST active

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

JST

UTC+09:00

HH03

MM00

(next day)03:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

Edmonton

JST

12:00 AM

3:00 PM

2:00 AM

5:00 PM

4:00 AM

7:00 PM

6:00 AM

9:00 PM

8:00 AM

11:00 PM

10:00 AM

1:00 AM+1

12:00 PM

3:00 AM+1

2:00 PM

5:00 AM+1

4:00 PM

7:00 AM+1

6:00 PM

9:00 AM+1

8:00 PM

11:00 AM+1

10:00 PM

1:00 PM+1

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

MDT and JST on the World Map

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

MDT Zone

→

JST Zone

Explore all world timezones interactively →

MST – Mountain Standard Time

UTC-07:00

Mountain Standard Time (MST) is the time zone for the Mountain region of North America, 7 hours behind UTC.

Countries in MST

United States (Mountain)Canada (Alberta)Mexico (Chihuahua, Sonora)

Major Cities in MST

DenverPhoenixSalt Lake CityCalgaryEdmontonAlbuquerqueEl PasoTucsonBoiseCiudad Juárez

Key Facts about MST

•Arizona does not observe daylight saving time, staying on MST year-round.
•The Navajo Nation in Arizona does observe DST, unlike the rest of the state.
•Denver, the 'Mile High City', is the largest city fully in MST.
•MST covers 6 US states entirely and parts of several others.

Daylight Saving:Yes – switches to MDT

Learn more about MST on Wikipedia

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

About Edmonton

Wikipedia

Edmonton operates on Mountain Time (MST/MDT), same as Denver. As Alberta's capital and an energy hub, Edmonton time aligns with Western Canadian markets.

Population:1 million

Metro:1.4 million

Business Hours:8:00 AM - 5:00 PM MST

Currency:CAD (C$)

Stock Exchange:N/A (Uses TSX)

Key Landmarks

West Edmonton MallFort Edmonton ParkArt Gallery of AlbertaMuttart ConservatoryRiver Valley

Did You Know?

The city has the most extensive urban parkland in North America.

Learn more about MDT timezone →

Comparing Time Zones: Edmonton and JST

Edmonton runs on Mountain Daylight Time (MDT) at UTC-06:00, currently observing daylight saving time. JST runs on Japan Standard Time (JST) at UTC+09:00. That puts Edmonton 15 hours ahead of JST — a difference of +15h at the current offsets.

In practice, when it is 9:00 AM in Edmonton it is 12:00 AM in JST on the next day. Midnight in Edmonton is 3:00 PM in JST.Edmonton observes daylight saving time while JST does not, so the gap narrows or widens by an hour part of the year.

Edmonton to JST time conversion table

Edmonton (MDT)	JST (JST)	Day
12:00 AM	3:00 PM	same day
6:00 AM	9:00 PM	same day
7:00 AM	10:00 PM	same day
8:00 AM	11:00 PM	same day
9:00 AM	12:00 AM	next day
12:00 PM	3:00 AM	next day
3:00 PM	6:00 AM	next day
5:00 PM	8:00 AM	next day
6:00 PM	9:00 AM	next day
9:00 PM	12:00 PM	next day

Why people convert Edmonton to JST time

Scheduling a call from Edmonton to JST: a 10:00 AM start in Edmonton lands at 1:00 AM in JST the next day, so you can confirm the slot without doing the arithmetic yourself.
Handling a +15h gap: Edmonton and JST 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 JST is 12:00 AM in Edmonton.
Keeping family and friends in sync: knowing that 8:00 PM in Edmonton is 11:00 AM in JST makes it easy to avoid calling at 3 AM.

Always state the zone abbreviation, not just the hour. "3:00 PM MDT" is unambiguous; "3 PM" across a +15h gap is not.
With a +15h gap there is no shared 9-to-5 window, so alternate the early start: one week Edmonton takes the early slot, the next week JST does.
Edmonton: Clocks fall back on Sun, Nov 1, 2026. Re-check this page after that date because the offset changes and so does the +15h gap.

About MST (Mountain Standard Time)

Mountain Standard Time (MST) covers the Rocky Mountain region of the United States and Canada. Arizona is notable for not observing daylight saving time, staying on MST year-round (except the Navajo Nation). The time zone includes major cities like Denver, Phoenix, Calgary, and Salt Lake City. During summer, most areas switch to Mountain Daylight Time (MDT, UTC-06:00).

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 Edmonton and JST

With a +15h offset there is no overlap inside a normal 9 AM – 5 PM day. JST opens at 9:00 AM JST, which is 12:00 AM in Edmonton, so real-time calls need an early-morning or late-evening slot on one side.

Business hours overlap

Edmonton and JST have no shared working hours because of the +15h gap. Teams need to alternate early starts or rely on asynchronous handovers.

Edmonton is 15 hours ahead of JST (MDT UTC-06:00 → 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

Edmonton

☀ Currently in DST

Standard: UTC-07:00 · DST: UTC-06:00

Clocks fall back on Sun, Nov 1, 2026

JST

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:

⏳

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 Edmonton and JST?

Edmonton (MDT, UTC-06:00) is 15 hours ahead of JST (JST, UTC+09:00). The gap is currently +15h.

How do I convert Edmonton time to JST time?

Add +15h to Edmonton local time. For example, 9:00 AM in Edmonton is 12:00 AM in JST (next day).

What time is it in JST right now?

JST 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 +15h offset from Edmonton.

What is the best time to call JST from Edmonton?

There is no shared working-hours window because of the +15h gap. The closest option is 1:00 PM in Edmonton, which is 4:00 AM in JST.

Which is ahead, Edmonton or JST?

Edmonton is 15 hours ahead of JST. When it is 12:00 PM in Edmonton it is 3:00 AM in JST.

Do Edmonton and JST use different time zones?

Edmonton (Canada) uses MDT at UTC-06:00, while JST uses JST at UTC+09:00. The IANA identifiers are America/Edmonton and Asia/Tokyo.

Does daylight saving time affect the Edmonton–JST difference?

Yes at the moment: Edmonton is on daylight saving time and JST is not, so the +15h gap shifts by an hour when exactly one of them changes clocks.

Which other cities share Edmonton's time zone?

MDT also covers Denver, Phoenix, Salt Lake City, Calgary, Edmonton, Albuquerque, El Paso, Tucson and 2 more.

Which countries use MDT, Edmonton's zone?

MDT is used in United States (Mountain), Canada (Alberta), Mexico (Chihuahua, Sonora).

Is there a day difference between Edmonton and JST?

Sometimes. The +15h gap is large enough that 8:00 PM or later in Edmonton already falls on the next day in JST.

What is the time difference between Edmonton and JST?

JST is +15h from Edmonton.

What timezone is Edmonton in?

Edmonton operates on Mountain Time (MST/MDT), same as Denver. As Alberta's capital and an energy hub, Edmonton time aligns with Western Canadian markets.

What timezone is JST in?

JST operates on its local timezone.

What are the business hours in Edmonton?

Standard business hours in Edmonton are 8:00 AM - 5:00 PM MST.

Which countries use MST (Mountain Standard Time)?

MST is used in United States (Mountain), Canada (Alberta), Mexico (Chihuahua, Sonora).

Does MST observe daylight saving time?

Yes, MST switches to MDT during summer months.

What are some interesting facts about MST?

Arizona does not observe daylight saving time, staying on MST year-round. The Navajo Nation in Arizona does observe DST, unlike the rest of the state.