Tokyo to Great Falls time converter

Great Falls is 15 hours behind Tokyo. When it is 9:00 AM in Tokyo, it is 6:00 PM (Sun, Oct 18) in Great Falls.

Tokyo JST

Monday, October 19, 2026

Great Falls MDT

Monday, October 19, 2026

Tokyo
Japan
Mon, Oct 19
JSTUTC+9
Great Falls
Montana, United States
Mon, Oct 19
MDTUTC-6-15h
Finding your time zone…
Shared working hours (9:00–18:00)

Tokyo to Great Falls conversion table

Every hour of today in Tokyo and the matching time in Great Falls. Light rows are typical working hours (9:00–18:00).

TokyoGreat Falls
12:00 AM9:00 AM−1 day
1:00 AM10:00 AM−1 day
2:00 AM11:00 AM−1 day
3:00 AM12:00 PM−1 day
4:00 AM1:00 PM−1 day
5:00 AM2:00 PM−1 day
6:00 AM3:00 PM−1 day
7:00 AM4:00 PM−1 day
8:00 AM5:00 PM−1 day
9:00 AM6:00 PM−1 day
10:00 AM7:00 PM−1 day
11:00 AM8:00 PM−1 day
12:00 PM9:00 PM−1 day
1:00 PM10:00 PM−1 day
2:00 PM11:00 PM−1 day
3:00 PM12:00 AM
4:00 PM1:00 AM
5:00 PM2:00 AM
6:00 PM3:00 AM
7:00 PM4:00 AM
8:00 PM5:00 AM
9:00 PM6:00 AM
10:00 PM7:00 AM
11:00 PM8:00 AM

Best time to call or meet

Working hours don't overlap fully. The closest fit is 7:00 AM – 9:00 AM in Tokyo (4:00 PM – 6:00 PM in Great Falls): working hours on one side, early or late on the other.

Daylight saving time and the difference

The difference changes during the year because Tokyo and Great Falls switch clocks on different dates:

  • Oct 19, 2026 – Nov 1, 2026: -15h
  • Nov 1, 2026 – Mar 14, 2027: -16h
  • Mar 14, 2027 – Oct 19, 2027: -15h

Distance

Tokyo and Great Falls are 8,388 km (5,212 miles) apart in a straight line.

More conversions

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New York to Great FallsLondon to Great FallsLos Angeles to Great FallsChicago to Great FallsToronto to Great FallsSão Paulo to Great FallsParis to Great FallsBerlin to Great FallsMoscow to Great FallsDubai to Great FallsNew Delhi to Great FallsBangkok to Great Falls

Questions and answers

What is the time difference between Tokyo and Great Falls?

Great Falls is 15 hours behind Tokyo.

What time is it in Great Falls when it is 9 AM in Tokyo?

When it is 9:00 AM in Tokyo, it is 6:00 PM (Sun, Oct 18) in Great Falls.

When is the best time to call Great Falls from Tokyo?

Working hours don't overlap fully. The closest fit is 7:00 AM – 9:00 AM in Tokyo (4:00 PM – 6:00 PM in Great Falls): working hours on one side, early or late on the other.

Does the time difference between Tokyo and Great Falls change?

Yes, for part of the year, because daylight saving time starts and ends on different dates or applies on one side only.