MDT to JST Time Converter
Use this MDT to JST time converter to compare US Mountain and Japan time instantly. JST is 15 hours ahead of MDT, so 9:00 AM MDT becomes 12:00 AM (next day) JST and 5:00 PM MDT becomes 8:00 AM (next day) JST. The page is useful for business-hours overlap, international calls, remote-team handoffs, webinars, and travel planning, with daylight saving adjustments handled automatically.
MDT to JST Quick Facts
Use this MDT to JST converter to compare US Mountain and Japan time, check the 15 hours gap, and confirm the right slot for calls, handoffs, and deadlines. Find the best overlap for calls and meetings.
How to Convert MDT to JST
Converting between Mountain Daylight Time and Japan Standard Time means accounting for a 15 hours gap — here's how to do it in under 10 seconds with no sign-up.
Pick the date and time in Mountain Daylight Time (UTC -6) that you want to convert. Hit "Now" to load the current MDT time instantly, or use "+1h" to step forward and compare.
The equivalent Japan Standard Time (UTC +9) time appears immediately. Since JST is 15 hours ahead of MDT, conversions often cross midnight — look for the date-change label.
Click "Copy Time" to grab the JST result for your calendar or message. Use "+1d" to check how the conversion shifts across dates — helpful for scheduling recurring United States–Japan calls.
Why Choose Our MDT to JST Converter
With 15 hours between MDT and JST, business-hours overlap is limited. This tool instantly shows which hours work on both sides, so you can lock in a meeting without a chain of "does 3 PM work for you?" emails.
A MDT evening at 9 PM is already the next morning in JST. This converter flags date changes beside the result — critical when booking flights, hitting deadlines, or scheduling across the United States–Japan corridor.
Daylight Saving adjustments can widen or narrow the MDT–JST gap by an hour. During transition weeks many people get it wrong. This converter pulls the current UTC offsets automatically, so the result is right even on the changeover day.
Product launches, sports matches, and webinars are often announced in MDT. Convert the event time to JST so you know exactly when to tune in — with a 15 hours difference, a morning event in United States falls during work hours in Japan.
MDT to JST Time Conversion Chart
Quick-reference conversion table covering every hour of the day at a glance.
Mountain Daylight Time to Japan Standard Time full day schedule
| Mountain Daylight Time | Japan Standard Time |
|---|---|
| 12:00 AM |
3:00 PM
|
| 1:00 AM |
4:00 PM
|
| 2:00 AM |
5:00 PM
|
| 3:00 AM |
6:00 PM
|
| 4:00 AM |
7:00 PM
|
| 5:00 AM |
8:00 PM
|
| 6:00 AM |
9:00 PM
|
| 7:00 AM |
10:00 PM
|
| 8:00 AM |
11:00 PM
|
| 9:00 AM |
12:00 AM
(next day)
|
| 10:00 AM |
1:00 AM
(next day)
|
| 11:00 AM |
2:00 AM
(next day)
|
| 12:00 PM |
3:00 AM
(next day)
|
| 1:00 PM |
4:00 AM
(next day)
|
| 2:00 PM |
5:00 AM
(next day)
|
| 3:00 PM |
6:00 AM
(next day)
|
| 4:00 PM |
7:00 AM
(next day)
|
| 5:00 PM |
8:00 AM
(next day)
|
| 6:00 PM |
9:00 AM
(next day)
|
| 7:00 PM |
10:00 AM
(next day)
|
| 8:00 PM |
11:00 AM
(next day)
|
| 9:00 PM |
12:00 PM
(next day)
|
| 10:00 PM |
1:00 PM
(next day)
|
| 11:00 PM |
2:00 PM
(next day)
|
Popular MDT Time Converters
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Convert Other Time Zones to JST
Find the time difference from any major zone into Japan Standard Time. Use these pages when scheduling with Japan from a different region.