Time difference between Hong Kong and San Francisco

Hong Kong is located in China and uses the Asia/Hong_Kong timezone (UTC+08:00). San Francisco is located in United States and uses the America/Los_Angeles timezone (UTC-07:00). The time difference between Hong Kong and San Francisco is 15 hours. San Francisco is 15 hours behind Hong Kong.

When planning meetings or calls between Hong Kong and San Francisco, consider the time difference and each city's working hours. The live clocks on this page update every second to show the exact current time in both cities, accounting for daylight saving time automatically.

Hong Kong is not currently observing daylight saving time (UTC+08:00). San Francisco is currently observing daylight saving time (UTC-07:00). The time difference may change when either city transitions into or out of DST.

How this time difference works

The time difference between Hong Kong and San Francisco is calculated by comparing their UTC offsets. Hong Kong uses the Asia/Hong_Kong timezone (UTC+08:00) and San Francisco uses the America/Los_Angeles timezone (UTC-07:00). The difference between these offsets gives the time gap.

Both cities may observe daylight saving time, which changes their UTC offset seasonally. The live clocks on this page update every second and automatically account for any DST transitions that may be in effect.

  1. Select Hong Kong and San Francisco from the city lists on the Time Zone Converter.
  2. The tool compares the current UTC offset of both timezones, including any DST adjustments.
  3. The result shows the exact hour difference and which city is ahead or behind.
  4. Use the live clocks to see the current time in both cities side by side.

Examples

Input

12:00 PM in Hong Kong

Output

04:00 in San Francisco

Time difference: 15 hours

Input

9:00 AM in San Francisco

Output

08:00 in Hong Kong

Useful for scheduling morning meetings between the two cities.

Common mistakes when calculating time differences

Watch out for these common errors:

  • Forgetting that DST changes the UTC offset. Hong Kong is not currently in DST, and San Francisco is currently in DST. The time difference may change when DST transitions occur.
  • Assuming the time difference is always a whole number. Some timezones use 30 or 45 minute offsets.
  • Confusing which city is ahead and which is behind. The city further east is always ahead in time.
  • Using fixed offsets instead of IANA timezone identifiers. Fixed offsets do not account for DST.

Frequently asked questions

What is the time difference between Hong Kong and San Francisco?

Hong Kong is in the Asia/Hong_Kong timezone (UTC+08:00) and San Francisco is in the America/Los_Angeles timezone (UTC-07:00). The time difference is 15 hours. This difference may change during daylight saving time transitions.

When it's noon in Hong Kong, what time is it in San Francisco?

When it's 12:00 PM in Hong Kong, it's 04:00 in San Francisco. The time difference is 15 hours.

Do Hong Kong and San Francisco have daylight saving time?

Hong Kong is not currently observing DST (UTC+08:00). San Francisco is currently observing DST (UTC-07:00).

Related tools

World ClockSee the current time in cities around the world simultaneously.Time Zone ConverterConvert any time from one timezone to another with a visual timeline.Best Meeting Time CalculatorFind the best meeting time across multiple timezones.Time Zone Difference CalculatorCompare timezones and see working hour overlaps.