Sydney to San Mateo time converter

San Mateo is 18 hours behind Sydney. When it is 9:00 AM in Sydney, it is 3:00 PM (Wed, Oct 21) in San Mateo.

Sydney AEDT

Thursday, October 22, 2026

San Mateo PDT

Wednesday, October 21, 2026

Sydney
New South Wales, Australia
Thu, Oct 22
AEDTUTC+11
San Mateo
California, United States
Wed, Oct 21
PDTUTC-7-18h
Finding your time zone…
Shared working hours (9:00–18:00)

Sydney to San Mateo conversion table

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

SydneySan Mateo
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 San Mateo).

Daylight saving time and the difference

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

  • Oct 22, 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 22, 2027: -18h

Distance

Sydney and San Mateo are 11,943 km (7,421 miles) apart in a straight line.

More conversions

San Mateo 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 San MateoLondon to San MateoLos Angeles to San MateoChicago to San MateoToronto to San MateoSão Paulo to San MateoParis to San MateoBerlin to San MateoMoscow to San MateoDubai to San MateoNew Delhi to San MateoBangkok to San Mateo

Questions and answers

What is the time difference between Sydney and San Mateo?

San Mateo is 18 hours behind Sydney.

What time is it in San Mateo when it is 9 AM in Sydney?

When it is 9:00 AM in Sydney, it is 3:00 PM (Wed, Oct 21) in San Mateo.

When is the best time to call San Mateo from Sydney?

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

Does the time difference between Sydney and San Mateo change?

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