Castle Rock to Tokyo time converter

Tokyo is 15 hours ahead of Castle Rock. When it is 9:00 AM in Castle Rock, it is 12:00 AM (Tue, Oct 20) in Tokyo.

Castle Rock MDT

Monday, October 19, 2026

Tokyo JST

Monday, October 19, 2026

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

Castle Rock to Tokyo conversion table

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

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

Best time to call or meet

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

Daylight saving time and the difference

The difference changes during the year because Castle Rock and Tokyo 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

Castle Rock and Tokyo are 9,368 km (5,821 miles) apart in a straight line.

More conversions

Tokyo to Castle RockCastle Rock to New YorkCastle Rock to LondonCastle Rock to Los AngelesCastle Rock to ChicagoCastle Rock to TorontoCastle Rock to São PauloCastle Rock to ParisCastle Rock to BerlinCastle Rock to MoscowCastle Rock to DubaiCastle Rock to New DelhiCastle Rock to Bangkok
New York to TokyoLondon to TokyoLos Angeles to TokyoChicago to TokyoToronto to TokyoSão Paulo to TokyoParis to TokyoBerlin to TokyoMoscow to TokyoDubai to TokyoNew Delhi to TokyoBangkok to Tokyo

Questions and answers

What is the time difference between Castle Rock and Tokyo?

Tokyo is 15 hours ahead of Castle Rock.

What time is it in Tokyo when it is 9 AM in Castle Rock?

When it is 9:00 AM in Castle Rock, it is 12:00 AM (Tue, Oct 20) in Tokyo.

When is the best time to call Tokyo from Castle Rock?

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

Does the time difference between Castle Rock and Tokyo change?

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