MST to Tokyo
+15hMST
MSTSOURCETokyo
JSTGreen rows indicate typical business hours (9 AM - 5 PM)
MST and JST on the World Map
The map below highlights the MST (Mountain Standard Time) and JST (Japan Standard Time) timezone regions across the globe.
MST – Mountain Standard Time
UTC-07:00Mountain Standard Time (MST) is the time zone for the Mountain region of North America, 7 hours behind UTC.
- •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.
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 Tokyo
WikipediaTokyo operates on Japan Standard Time (JST), which is 14 hours ahead of New York. As Asia's largest financial hub, Tokyo trading hours are crucial for global markets.
The Tokyo subway system moves approximately 8.7 million passengers daily.
Everything You Need to Know About MST and Tokyo Time
MST (Mountain Standard Time) operates on the Mountain Standard Time (UTC-07:00). Tokyo, Japan uses Japan Standard Time (UTC+09:00).
The time difference between MST and Tokyo is 900 minutes (+15h). When it's noon in MST, it's 03:00 AM in Tokyo.
Why Convert MST to Tokyo Time?
Navigating the time gap between MST and Tokyo requires careful planning. With a difference of 15 hours, finding a suitable time for both locations is essential for effective collaboration. This tool simplifies the process, allowing you to instantly see the corresponding time in Tokyo.
Pro Tip: If you frequently communicate with people in Tokyo from MST, consider adding a dual-clock widget to your phone or computer to keep track of the 15-hour difference at a glance.
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 MST and Tokyo
If you want to reach someone in Tokyo during standard business hours (9 AM – 5 PM JST), the best time to call from MST would be:
- Tokyo 9:00 AM = MST 06:00 PM
- Tokyo 12:00 PM = MST 09:00 PM
- Tokyo 5:00 PM = MST 02:00 AM
Business Hours Overlap
MST and Tokyo have minimal business hours overlap due to the +15h time difference. Teams may need to schedule early morning or late evening meetings for real-time collaboration.
In summary, the +15h time difference between MST and Tokyo means you need to plan carefully. Use this page as your go-to reference for quick and accurate time conversions.
🕐 Daylight Saving Time Info
MST
☀ Currently in DST
Standard: UTC-07:00 · DST: UTC-06:00
Clocks fall back on Sun, Nov 1, 2026
Tokyo
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 MST and Tokyo?
Tokyo is +15h from MST.
What timezone is MST in?
MST operates on its local timezone.
What timezone is Tokyo in?
Tokyo operates on Japan Standard Time (JST), which is 14 hours ahead of New York. As Asia's largest financial hub, Tokyo trading hours are crucial for global markets.
What are the business hours in Tokyo?
Standard business hours in Tokyo are 9:00 AM - 6:00 PM JST.
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.
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 MST, what time is it in Tokyo?
When it is 12:00 AM (midnight) in MST (MST), it is +15h later in Tokyo (JST).
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