Altadena to London time converter

London is 8 hours ahead of Altadena. When it is 9:00 AM in Altadena, it is 5:00 PM in London.

Altadena PDT

Sunday, October 18, 2026

London BST

Sunday, October 18, 2026

Altadena
California, United States
Sun, Oct 18
PDTUTC-7
London
United Kingdom
Sun, Oct 18
BSTUTC+1+8h
Finding your time zone…
Shared working hours (9:00–18:00)

Altadena to London conversion table

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

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

Best time to call or meet

Both sides are at work from 9:00 AM – 10:00 AM in Altadena (5:00 PM – 6:00 PM in London).

Daylight saving time and the difference

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

  • Oct 18, 2026 – Oct 24, 2026: +8h
  • Oct 24, 2026 – Nov 1, 2026: +7h
  • Nov 1, 2026 – Mar 14, 2027: +8h
  • Mar 14, 2027 – Mar 27, 2027: +7h
  • Mar 27, 2027 – Oct 18, 2027: +8h

Distance

Altadena and London are 8,737 km (5,429 miles) apart in a straight line.

More conversions

London to AltadenaAltadena to New YorkAltadena to Los AngelesAltadena to ChicagoAltadena to TorontoAltadena to São PauloAltadena to ParisAltadena to BerlinAltadena to MoscowAltadena to DubaiAltadena to New DelhiAltadena to BangkokAltadena 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 Altadena and London?

London is 8 hours ahead of Altadena.

What time is it in London when it is 9 AM in Altadena?

When it is 9:00 AM in Altadena, it is 5:00 PM in London.

When is the best time to call London from Altadena?

Both sides are at work from 9:00 AM – 10:00 AM in Altadena (5:00 PM – 6:00 PM in London).

Does the time difference between Altadena 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.