San Mateo, CA to New York, NY: time difference
New York, NY is 3 h ahead of San Mateo, CA. Live clocks for both, the working hours they share, and how each one sits against your own time.
Your time
One day, 2 clocks
Drag along the band to read any hour in every place at once.
San Mateo, CA 09:44 9:44 AM New York, NY 12:44 12:44 PM You –:–
09:44 9:44 AM
Pacific Daylight Time · UTC-7
☀️ 07:21 · 🌙 18:29
12:44 12:44 PM
Eastern Daylight Time · UTC-4
☀️ 07:12 · 🌙 18:14
·
+3 h
New York, NY is 3 h ahead of San Mateo, CA.
When you, San Mateo, CA and New York, NY are all at the desk
Pick the working hours below – the window every location shares appears once your time zone is known.
Working hours
🇺🇸 San Mateo, CA
0 12 AM 1 1 AM 2 2 AM 3 3 AM 4 4 AM 5 5 AM 6 6 AM 7 7 AM 8 8 AM 9 9 AM 10 10 AM 11 11 AM 12 12 PM 13 1 PM 14 2 PM 15 3 PM 16 4 PM 17 5 PM 18 6 PM 19 7 PM 20 8 PM 21 9 PM 22 10 PM 23 11 PM
🇺🇸 New York, NY
3 3 AM 4 4 AM 5 5 AM 6 6 AM 7 7 AM 8 8 AM 9 9 AM 10 10 AM 11 11 AM 12 12 PM 13 1 PM 14 2 PM 15 3 PM 16 4 PM 17 5 PM 18 6 PM 19 7 PM 20 8 PM 21 9 PM 22 10 PM 23 11 PM 0 12 AM 1 1 AM 2 2 AM
📍 Your time
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Time zones side by side
| Detail | 🇺🇸 San Mateo, CA | 🇺🇸 New York, NY |
|---|---|---|
| Local time | 09:44 | 12:44 |
| Local date | Sunday, October 18, 2026 | Sunday, October 18, 2026 |
| Time zone | Pacific Daylight Time | Eastern Daylight Time |
| UTC offset | UTC-7 | UTC-4 |
| Offset from San Mateo, CA | — | +3 h |
| IANA zone | America/Los Angeles | America/New York |
| Daylight saving | On summer time → UTC-8, Nov 1, 01:00 | On summer time → UTC-5, Nov 1, 01:00 |
| Sunrise | 07:21 | 07:12 |
| Sunset | 18:29 | 18:14 |
| Daylight | 11 h 8 min | 11 h 2 min |
| People on this clock | 103,536 | 8,804,190 |
Compare San Mateo, CA with another city
More comparisons with San Mateo, CA: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
San Mateo, CA and New York, NY: common questions
How far ahead of San Mateo, CA, is New York, NY?
New York is 3 hours ahead of San Mateo: UTC−4 against UTC−7.
If it is 9:00 AM in San Mateo, CA, what time is it in New York, NY?
At 9:00 AM in San Mateo, clocks in New York show 12:00 PM.
If it is 6:00 PM in San Mateo, CA, what time is it in New York, NY?
At 6:00 PM in San Mateo, clocks in New York show 9:00 PM.
When do working hours in San Mateo, CA, and in New York, NY, overlap?
Working hours (9:00 AM–6:00 PM) overlap from 9:00 AM to 3:00 PM in San Mateo, which is 12:00 PM to 6:00 PM in New York.
When does the date change in New York, NY, compared with San Mateo, CA?
The new day starts in New York earlier: at 9:00 PM in San Mateo it is already midnight there. Until 3:00 AM in New York, San Mateo is still on the previous day.
Does the time difference between San Mateo, CA, and New York, NY, change?
No. The clocks in San Mateo and in New York change on the same dates, so the difference stays 3 hours.
