London to Castle Rock time converter

Castle Rock is 7 hours behind London. When it is 9:00 AM in London, it is 2:00 AM in Castle Rock.

London BST

Tuesday, October 20, 2026

Castle Rock MDT

Tuesday, October 20, 2026

London
United Kingdom
Tue, Oct 20
BSTUTC+1
Castle Rock
Colorado, United States
Tue, Oct 20
MDTUTC-6-7h
Finding your time zone…
Shared working hours (9:00–18:00)

London to Castle Rock conversion table

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

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

Best time to call or meet

Both sides are at work from 4:00 PM – 6:00 PM in London (9:00 AM – 11:00 AM in Castle Rock).

Daylight saving time and the difference

The difference changes during the year because London and Castle Rock switch clocks on different dates:

  • Oct 20, 2026 – Oct 25, 2026: -7h
  • Oct 25, 2026 – Nov 1, 2026: -6h
  • Nov 1, 2026 – Mar 14, 2027: -7h
  • Mar 14, 2027 – Mar 28, 2027: -6h
  • Mar 28, 2027 – Oct 20, 2027: -7h

Distance

London and Castle Rock are 7,564 km (4,700 miles) apart in a straight line.

More conversions

Castle Rock to LondonLondon to New YorkLondon to Los AngelesLondon to ChicagoLondon to TorontoLondon to São PauloLondon to ParisLondon to BerlinLondon to MoscowLondon to DubaiLondon to New DelhiLondon to BangkokLondon to Singapore
New York 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 RockSingapore to Castle Rock

Questions and answers

What is the time difference between London and Castle Rock?

Castle Rock is 7 hours behind London.

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

When it is 9:00 AM in London, it is 2:00 AM in Castle Rock.

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

Both sides are at work from 4:00 PM – 6:00 PM in London (9:00 AM – 11:00 AM in Castle Rock).

Does the time difference between London 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.