Geneva to Costa Mesa time converter

Costa Mesa is 9 hours behind Geneva. When it is 9:00 AM in Geneva, it is 12:00 AM in Costa Mesa.

Geneva CEST

Tuesday, October 20, 2026

Costa Mesa PDT

Tuesday, October 20, 2026

Geneva
Switzerland
Tue, Oct 20
CESTUTC+2
Costa Mesa
California, United States
Tue, Oct 20
PDTUTC-7-9h
Finding your time zone…
Shared working hours (9:00–18:00)

Geneva to Costa Mesa conversion table

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

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

Best time to call or meet

Working hours don't overlap fully. The closest fit is 4:00 PM – 6:00 PM in Geneva (7:00 AM – 9:00 AM in Costa Mesa): working hours on one side, early or late on the other.

Daylight saving time and the difference

The difference changes during the year because Geneva and Costa Mesa switch clocks on different dates:

  • Oct 20, 2026 – Oct 25, 2026: -9h
  • Oct 25, 2026 – Nov 1, 2026: -8h
  • Nov 1, 2026 – Mar 14, 2027: -9h
  • Mar 14, 2027 – Mar 28, 2027: -8h
  • Mar 28, 2027 – Oct 20, 2027: -9h

Distance

Geneva and Costa Mesa are 9,516 km (5,913 miles) apart in a straight line.

More conversions

Costa Mesa to GenevaGeneva to New YorkGeneva to LondonGeneva to Los AngelesGeneva to ChicagoGeneva to TorontoGeneva to São PauloGeneva to ParisGeneva to BerlinGeneva to MoscowGeneva to DubaiGeneva to New DelhiGeneva to Bangkok
New York to Costa MesaLondon to Costa MesaLos Angeles to Costa MesaChicago to Costa MesaToronto to Costa MesaSão Paulo to Costa MesaParis to Costa MesaBerlin to Costa MesaMoscow to Costa MesaDubai to Costa MesaNew Delhi to Costa MesaBangkok to Costa Mesa

Questions and answers

What is the time difference between Geneva and Costa Mesa?

Costa Mesa is 9 hours behind Geneva.

What time is it in Costa Mesa when it is 9 AM in Geneva?

When it is 9:00 AM in Geneva, it is 12:00 AM in Costa Mesa.

When is the best time to call Costa Mesa from Geneva?

Working hours don't overlap fully. The closest fit is 4:00 PM – 6:00 PM in Geneva (7:00 AM – 9:00 AM in Costa Mesa): working hours on one side, early or late on the other.

Does the time difference between Geneva and Costa Mesa change?

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