Chicago to Altadena time converter

Altadena is 2 hours behind Chicago. When it is 9:00 AM in Chicago, it is 7:00 AM in Altadena.

Chicago CDT

Saturday, October 17, 2026

Altadena PDT

Saturday, October 17, 2026

Chicago
Illinois, United States
Sat, Oct 17
CDTUTC-5
Altadena
California, United States
Sat, Oct 17
PDTUTC-7-2h
Finding your time zone…
Shared working hours (9:00–18:00)

Chicago to Altadena conversion table

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

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

Best time to call or meet

Both sides are at work from 11:00 AM – 6:00 PM in Chicago (9:00 AM – 4:00 PM in Altadena).

Daylight saving time and the difference

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

  • Oct 17, 2026 – Nov 1, 2026: -2h
  • Nov 1, 2026 – Nov 1, 2026: -1h
  • Nov 1, 2026 – Mar 14, 2027: -2h
  • Mar 14, 2027 – Mar 14, 2027: -3h
  • Mar 14, 2027 – Oct 17, 2027: -2h

Distance

Chicago and Altadena are 2,786 km (1,731 miles) apart in a straight line.

More conversions

Altadena to ChicagoChicago to New YorkChicago to LondonChicago to Los AngelesChicago to TorontoChicago to São PauloChicago to ParisChicago to BerlinChicago to MoscowChicago to DubaiChicago to New DelhiChicago to BangkokChicago to Singapore
New York to AltadenaLondon to AltadenaLos Angeles to AltadenaToronto to AltadenaSão Paulo to AltadenaParis to AltadenaBerlin to AltadenaMoscow to AltadenaDubai to AltadenaNew Delhi to AltadenaBangkok to AltadenaSingapore to Altadena

Questions and answers

What is the time difference between Chicago and Altadena?

Altadena is 2 hours behind Chicago.

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

When it is 9:00 AM in Chicago, it is 7:00 AM in Altadena.

When is the best time to call Altadena from Chicago?

Both sides are at work from 11:00 AM – 6:00 PM in Chicago (9:00 AM – 4:00 PM in Altadena).

Does the time difference between Chicago 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.