Time Difference Between Hong Kong and San Francisco
San Francisco is 16h behind Hong Kong in standard time, and 15h behind while San Francisco is on daylight saving time.
Hong Kong keeps the same clock all year. San Francisco clocks move forward on the second Sunday of March and back on the first Sunday of November. The figures above cover each part of the year. They do not come from the offset on the day the site was built. The live clocks use the current time.
Working Hours Overlap
For each hour of Hong Kong's working day (9:00-18:00), here is the corresponding local time in San Francisco. Rows highlighted green fall within standard working hours (9:00-18:00) in both cities. Each block is one part of the year, so the table does not change with the day this page was built.
16h behind (standard time)
| Hong Kong | San Francisco | Both working hours? |
|---|---|---|
| 9 AM | 5 PM | Yes |
| 10 AM | 6 PM | No |
| 11 AM | 7 PM | No |
| 12 PM | 8 PM | No |
| 1 PM | 9 PM | No |
| 2 PM | 10 PM | No |
| 3 PM | 11 PM | No |
| 4 PM | 12 AM | No |
| 5 PM | 1 AM | No |
| 6 PM | 2 AM | No |
15h behind (daylight saving time in San Francisco, while Hong Kong is on standard time)
| Hong Kong | San Francisco | Both working hours? |
|---|---|---|
| 9 AM | 6 PM | No |
| 10 AM | 7 PM | No |
| 11 AM | 8 PM | No |
| 12 PM | 9 PM | No |
| 1 PM | 10 PM | No |
| 2 PM | 11 PM | No |
| 3 PM | 12 AM | No |
| 4 PM | 1 AM | No |
| 5 PM | 2 AM | No |
| 6 PM | 3 AM | No |
Best Time to Meet
16h behind (standard time)
- 9 AM-10 AM in Hong Kong (5 PM-6 PM in San Francisco) works for both sides. It falls within 9 AM-6 PM in both time zones.
15h behind (daylight saving time in San Francisco, while Hong Kong is on standard time)
Hong Kong and San Francisco don't share a 9 AM-6 PM working-hours window during daylight saving time in San Francisco, while Hong Kong is on standard time. The least disruptive compromise is around 6 AM in Hong Kong, which falls at 3 PM in San Francisco. Expect one side to take an early or late call.
How the Difference Changes
Only San Francisco changes its clocks, so the gap is not one number. The rules are above. The dates for the year you are reading this page load below.
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Hong Kong
Hong Kong uses the Asia/Hong_Kong time zone, at UTC+8 all year. This zone does not observe daylight saving time.
San Francisco
San Francisco uses the America/Los_Angeles time zone. Standard time is UTC-8, and daylight saving time is UTC-7.