MST to JST 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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From Timezone

MST

Mountain Standard Time

Time

Date

Date changes are handled automatically when conversions cross midnight.

To Timezone

JST

Japan Standard Time

Time

Date

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 MST to JST Conversion

Converting time between MST and JST requires understanding their time zone offsets and any daylight saving time adjustments. MST (MST) operates at UTC-7, while JST (JST) is set to UTC+9. This means JST is 16 hours ahead MST. Note that due to the time difference, the date may change. When it's 8:17 PM MST on February 3, 2026, it's 12:17 PM JST on February 4, 2026 in JST. Use this converter to quickly find the equivalent time in JST for any time in MST, whether you're scheduling meetings, planning travel, or coordinating with teams across different time zones.

How to Use the Time Zone Converter

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

More Conversions from MST

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

Frequently Asked Questions

What is the time difference between MST and JST?

The time difference between MST and JST is 16 hours. JST is 16 hours ahead MST.

Is JST ahead of or behind MST?

JST is ahead of MST by 16 hours. When it's 12 PM in MST, it's 4:00 AM in JST.

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

You add 16 hours to MST to get JST. For example, 12 PM MST + 16 hours = 4:00 AM JST.

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

No, the time difference between MST and JST remains constant throughout the year. Neither timezone observes Daylight Saving Time, so the 16-hour difference stays the same.

What is 12 PM MST in JST?

12 PM MST is 4:00 AM JST. This conversion accounts for the 16-hour time difference between the two timezones.

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

Yes, the conversion between MST and JST remains consistent throughout the year. Since neither timezone observes Daylight Saving Time, the 16-hour difference is constant, making conversions predictable and straightforward.

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