Tokyo to Castle Rock time converter

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

Tokyo JST

Monday, October 19, 2026

Castle Rock MDT

Monday, October 19, 2026

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

Tokyo to Castle Rock conversion table

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

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

More conversions

Castle Rock to TokyoTokyo to New YorkTokyo to LondonTokyo to Los AngelesTokyo to ChicagoTokyo to TorontoTokyo to São PauloTokyo to ParisTokyo to BerlinTokyo to MoscowTokyo to DubaiTokyo to New DelhiTokyo to Bangkok
New York to Castle RockLondon to Castle RockLos Angeles to Castle RockChicago to Castle RockToronto to Castle RockSão Paulo to Castle RockParis to Castle RockBerlin to Castle RockMoscow to Castle RockDubai to Castle RockNew Delhi to Castle RockBangkok to Castle Rock

Questions and answers

What is the time difference between Tokyo and Castle Rock?

Castle Rock is 15 hours behind Tokyo.

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

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

When is the best time to call Castle Rock 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 Castle Rock): working hours on one side, early or late on the other.

Does the time difference between Tokyo and Castle Rock change?

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