What is the time difference between JST and MDT?

JST is 15 hours behind MDT. JST is UTC+9 and MDT is UTC-6.

What is 9 AM JST in MDT?

9 AM JST is 6 PM MDT (previous day).

What is 12 PM JST in MDT?

12 PM JST (noon) is 9 PM MDT (previous day).

What are the best meeting times between JST and MDT?

There is no standard business hours overlap between JST and MDT.

JST to MDT Time Converter

Japan Standard Time → Mountain Daylight Time

JST

UTC+9

Japan Standard Time

offset

-15h

MDT is 15h behind

MDT

UTC-6

Mountain Daylight Time

Japan Standard Time (JST) is 15 hours behind Mountain Daylight Time (MDT). When it is noon in JST, it is 9 PM in MDT. This offset is fixed year-round.

Meeting planner tool Reverse: MDT to JST

Cities in JST

🇯🇵Tokyo 🇯🇵Osaka

Cities in MDT

🇺🇸Denver 🇨🇦Calgary

All 24 Hours — JST to MDT

Click any row to see the full detail page. Current hour in JST is highlighted.

Both business hoursPartial overlap

12 AM6 AM12 PM6 PM11 PM

Best Meeting Times — JST & MDT

No standard business-hours overlap between JST and MDT. Consider early morning or evening calls.

Challenging overlap

JST and MDT are 15 hours apart with no shared business-hours window. Try scheduling at 8 AM in the earlier timezone or 6 PM in the later one.

8 AM→5 PM−1d 9 AM→6 PM−1d 10 AM→7 PM−1d 11 AM→8 PM−1d 12 PM→9 PM−1d 1 PM→10 PM−1d 2 PM→11 PM−1d 3 PM→12 AM 4 PM→1 AM 5 PM→2 AM

Related Time Zone Conversions

Frequently Asked Questions — JST to MDT

Japan Standard Time (JST) is 15 hours behind Mountain Daylight Time (MDT). JST is UTC+9 and MDT is UTC-6.

Live Now

JST

UTC+9

20:04:28

Saturday

MDT

UTC-6

05:04:28

Saturday

Right now, 8 PM JST = 5 AM MDT

Business Hours Quick Jump

Reverse Conversion

MDT to JST

Mountain Daylight Time → Japan Standard Time

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