London to San Mateo time converter
San Mateo is 7 hours ahead of London. When it is 9:00 AM in London, it is 4:00 PM in San Mateo.
12:50 AM in London, Wednesday, October 21, 2026
London to San Mateo conversion table
Every hour of today in London and the matching time in San Mateo. Light rows are typical working hours (9:00–18:00).
| London | San Mateo |
|---|---|
| 12:00 AM | 7:00 AM |
| 1:00 AM | 8:00 AM |
| 2:00 AM | 9:00 AM |
| 3:00 AM | 10:00 AM |
| 4:00 AM | 11:00 AM |
| 5:00 AM | 12:00 PM |
| 6:00 AM | 1:00 PM |
| 7:00 AM | 2:00 PM |
| 8:00 AM | 3:00 PM |
| 9:00 AM | 4:00 PM |
| 10:00 AM | 5:00 PM |
| 11:00 AM | 6:00 PM |
| 12:00 PM | 7:00 PM |
| 1:00 PM | 8:00 PM |
| 2:00 PM | 9:00 PM |
| 3:00 PM | 10:00 PM |
| 4:00 PM | 11:00 PM |
| 5:00 PM | 12:00 AM+1 day |
| 6:00 PM | 1:00 AM+1 day |
| 7:00 PM | 2:00 AM+1 day |
| 8:00 PM | 3:00 AM+1 day |
| 9:00 PM | 4:00 AM+1 day |
| 10:00 PM | 5:00 AM+1 day |
| 11:00 PM | 6:00 AM+1 day |
Best time to call or meet
Both sides are at work from 9:00 AM – 11:00 AM in London (4:00 PM – 6:00 PM in San Mateo).
Daylight saving time and the difference
The difference changes during the year because London and San Mateo switch clocks on different dates:
- Oct 21, 2026 – Oct 25, 2026: +7h
- Oct 25, 2026 – Mar 28, 2027: +8h
- Mar 28, 2027 – Oct 21, 2027: +7h
Distance
London and San Mateo are 10,734 km (6,670 miles) apart in a straight line.
More conversions
Questions and answers
What is the time difference between London and San Mateo?
San Mateo is 7 hours ahead of London.
What time is it in San Mateo when it is 9 AM in London?
When it is 9:00 AM in London, it is 4:00 PM in San Mateo.
When is the best time to call San Mateo from London?
Both sides are at work from 9:00 AM – 11:00 AM in London (4:00 PM – 6:00 PM in San Mateo).
Does the time difference between London 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.