Sydney to Altadena time converter

Altadena is 18 hours behind Sydney. When it is 9:00 AM in Sydney, it is 3:00 PM (Sat, Oct 17) in Altadena.

Sydney AEDT

Sunday, October 18, 2026

Altadena PDT

Saturday, October 17, 2026

Sydney
New South Wales, Australia
Sun, Oct 18
AEDTUTC+11
Altadena
California, United States
Sat, Oct 17
PDTUTC-7-18h
Finding your time zone…
Shared working hours (9:00–18:00)

Sydney to Altadena conversion table

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

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

Best time to call or meet

Both sides are at work from 9:00 AM – 12:00 PM in Sydney (3:00 PM – 6:00 PM in Altadena).

Daylight saving time and the difference

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

  • Oct 18, 2026 – Nov 1, 2026: -18h
  • Nov 1, 2026 – Mar 14, 2027: -19h
  • Mar 14, 2027 – Apr 4, 2027: -18h
  • Apr 4, 2027 – Oct 3, 2027: -17h
  • Oct 3, 2027 – Oct 18, 2027: -18h

Distance

Sydney and Altadena are 12,090 km (7,512 miles) apart in a straight line.

More conversions

Altadena to SydneySydney to New YorkSydney to LondonSydney to Los AngelesSydney to ChicagoSydney to TorontoSydney to São PauloSydney to ParisSydney to BerlinSydney to MoscowSydney to DubaiSydney to New DelhiSydney to Bangkok
New York to AltadenaLondon to AltadenaLos Angeles to AltadenaChicago to AltadenaToronto to AltadenaSão Paulo to AltadenaParis to AltadenaBerlin to AltadenaMoscow to AltadenaDubai to AltadenaNew Delhi to AltadenaBangkok to Altadena

Questions and answers

What is the time difference between Sydney and Altadena?

Altadena is 18 hours behind Sydney.

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

When it is 9:00 AM in Sydney, it is 3:00 PM (Sat, Oct 17) in Altadena.

When is the best time to call Altadena from Sydney?

Both sides are at work from 9:00 AM – 12:00 PM in Sydney (3:00 PM – 6:00 PM in Altadena).

Does the time difference between Sydney and Altadena change?

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