JST to MDT Converter

Convert between any time zones worldwide. Free and accurate time zone converter with DST support.

Edit time and date on either side to see the conversion instantly.

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JST
Japan Standard Time
Date changes are handled automatically when conversions cross midnight.
MST
Mountain Standard Time
Date changes are handled automatically when conversions cross midnight.

Popular Timezone Conversions

CST to EST PST to EST MST to EST GMT to EST JST to EST GST to EST IST to EST EST to GMT

About JST to MDT Conversion

Converting time between JST and MST requires understanding their time zone offsets and any daylight saving time adjustments. JST (JST) operates at UTC+9, while MST (MDT) is set to UTC-7. This means MST is 16 hours behind JST. Note that due to the time difference, the date may change. When it's 12:17 PM JST on February 4, 2026, it's 8:17 PM MDT on February 3, 2026 in MST. America/Denver observes daylight saving time, switching between MST (UTC-7) and MDT (UTC-6), while Asia/Tokyo does not observe daylight saving time. Use this converter to quickly find the equivalent time in MST for any time in JST, whether you're scheduling meetings, planning travel, or coordinating with teams across different time zones.

How to Use the Time Zone Converter

  1. Select your source timezone from the "From timezone" dropdown (use search to find quickly)
  2. Enter the date and time you want to convert (or click "Today" and "Now" for current time)
  3. Select your target timezone from the "To timezone" dropdown
  4. The conversion updates automatically as you change inputs - no button needed!
  5. Use "Copy" button to copy the converted time, or use presets for quick conversions

More Conversions from JST

JST to EST JST to CST JST to MST JST to PST JST to AKST JST to HST JST to GMT JST to CET JST to EET JST to MSK JST to IST JST to CST-CHINA JST to HKT JST to SGT JST to GST JST to AEST JST to AWST JST to NZST JST to UTC JST to ART JST to BRT JST to PHT JST to BDT JST to KST JST to SAST JST to ICT JST to EAT JST to WAT JST to PKT

Frequently Asked Questions

What is the time difference between JST and MDT?

The time difference between JST and MDT is 16 hours. MDT is 16 hours behind JST.

Is MDT ahead of or behind JST?

MDT is behind JST by 16 hours. When it's 9 AM in JST, it's 5:00 PM in MDT.

How many hours do you add to JST to get MDT?

You subtract 16 hours from JST to get MDT. For example, 9 AM JST - 16 hours = 5:00 PM MDT.

Does the JST to MDT time difference change during Daylight Saving Time?

Yes, the time difference can change during Daylight Saving Time (DST). MDT observes DST, which can affect the time difference during the transition periods in spring and fall.

What is 9 AM JST in MDT?

9 AM JST is 5:00 PM MDT. This conversion accounts for the 16-hour time difference between the two timezones.

Is JST the same throughout the year when converting to MDT?

No, the conversion between JST and MDT can vary during the year due to Daylight Saving Time. The time difference may change by 1 hour during DST transition periods (typically March and November), so always use a current timezone converter for accurate conversions.

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