Castle Rock to London time converter

London is 7 hours ahead of Castle Rock. When it is 9:00 AM in Castle Rock, it is 4:00 PM in London.

Castle Rock MDT

Tuesday, October 20, 2026

London BST

Tuesday, October 20, 2026

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

Castle Rock to London conversion table

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

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

Best time to call or meet

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

Daylight saving time and the difference

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

  • Oct 20, 2026 – Oct 24, 2026: +7h
  • Oct 24, 2026 – Nov 1, 2026: +6h
  • Nov 1, 2026 – Mar 14, 2027: +7h
  • Mar 14, 2027 – Mar 27, 2027: +6h
  • Mar 27, 2027 – Oct 20, 2027: +7h

Distance

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

More conversions

London to Castle RockCastle Rock to New YorkCastle 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 BangkokCastle Rock to Singapore
New York to LondonLos Angeles to LondonChicago to LondonToronto to LondonSão Paulo to LondonParis to LondonBerlin to LondonMoscow to LondonDubai to LondonNew Delhi to LondonBangkok to LondonSingapore to London

Questions and answers

What is the time difference between Castle Rock and London?

London is 7 hours ahead of Castle Rock.

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

When it is 9:00 AM in Castle Rock, it is 4:00 PM in London.

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

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

Does the time difference between Castle Rock and London change?

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