When it is 09:00 in San Francisco it is 01:00 in Hong Kong in January and 00:00 in July. Hong Kong is 16 hours ahead San Francisco right now — but it is not constant: the difference is 16 hours ahead in January and 15 hours ahead in July. This page gives the live times in both cities, the overlap between their working days, the daylight saving dates that move the difference, and the best meeting windows.
Try the tool: Time Zone Converter — convert any time between San Francisco and Hong Kong, with the offset for the date you pick.
Live times in San Francisco and Hong Kong
The two cities side by side. The January column uses the winter offsets (San Francisco UTC−08:00, Hong Kong UTC+08:00); the July column uses the summer offsets (San Francisco UTC−07:00, Hong Kong UTC+08:00).
| Time in San Francisco | Hong Kong in January | Hong Kong in July |
|---|---|---|
| 00:00 | 16:00 | 15:00 |
| 06:00 | 22:00 | 21:00 |
| 09:00 | 01:00 | 00:00 |
| 12:00 | 04:00 | 03:00 |
| 15:00 | 07:00 | 06:00 |
| 17:00 | 09:00 | 08:00 |
| 21:00 | 13:00 | 12:00 |
The world clock shows the current time in both cities live, and the individual city pages — time in San Francisco and time in Hong Kong — explain each city's time zone, offsets and daylight saving in full.
The time difference between San Francisco and Hong Kong
The difference is not constant. In January Hong Kong is 16 hours ahead San Francisco; in July it is 15 hours ahead San Francisco. The difference changes on Sunday, 8 March 2026 (from 16 hours ahead to 15 hours ahead) and Sunday, 1 November 2026 (from 15 hours ahead to 16 hours ahead) — those are the dates when one of the two cities changes its clocks and the other does not, or when they change on different days. Between those dates the difference is one value; outside them it is the other.
To convert a time, add the difference: 09:00 in San Francisco is 01:00 in Hong Kong in January and 00:00 in July; 17:00 in San Francisco — the end of the working day — is 09:00 in Hong Kong in January and 08:00 in July. To go the other way, subtract it: 09:00 in Hong Kong is 17:00 in San Francisco in January. The time difference calculator does the arithmetic for any date, and the UTC to Hong Kong page gives the full conversion table for Hong Kong.
Meeting overlap between San Francisco and Hong Kong
The overlap is the hours when both cities are in their working day (09:00–17:00 local time). The table marks the overlapping hours in San Francisco's working day and shows what time they are in Hong Kong.
January
| San Francisco time | Hong Kong time | Both working? |
|---|---|---|
| 09:00 | 01:00 | Yes |
| 10:00 | 02:00 | Yes |
| 11:00 | 03:00 | Yes |
| 12:00 | 04:00 | Yes |
| 13:00 | 05:00 | Yes |
| 14:00 | 06:00 | Yes |
| 15:00 | 07:00 | Yes |
| 16:00 | 08:00 | Yes |
July
| San Francisco time | Hong Kong time | Both working? |
|---|---|---|
| 09:00 | 00:00 | No |
| 10:00 | 01:00 | No |
| 11:00 | 02:00 | No |
| 12:00 | 03:00 | No |
| 13:00 | 04:00 | No |
| 14:00 | 05:00 | No |
| 15:00 | 06:00 | No |
| 16:00 | 07:00 | No |
In January the overlap is 8 hours: 09:00, 10:00, 11:00, 12:00, 13:00, 14:00, 15:00, 16:00 San Francisco time. In July it is 0 hours: there is no hour when both cities are in their working day. The meeting planner finds the overlap for any two cities and any date, and the meeting time finder finds it for a whole team.
Daylight saving in San Francisco and Hong Kong
San Francisco observes daylight saving: in 2026 the clocks go forward on 8 March 2026 and back on 1 November 2026, moving the offset from UTC−08:00 to UTC−07:00.
Hong Kong does not observe daylight saving, so its offset of UTC+08:00 never changes.
The difference changes on Sunday, 8 March 2026 and Sunday, 1 November 2026 in 2026. On those dates, one city changes its clocks and the other does not — or they change on different days — so the difference moves by an hour. A standing meeting set in one city's local time will land an hour early or late on the other side until the second city catches up. The fix is to set the calendar event in UTC, or to check the overlap again after each change. The individual DST pages — San Francisco DST 2026 and Hong Kong DST 2026 — give the exact dates for each city.
Best meeting windows
The best windows in January are 09:00–17:00 in San Francisco (01:00–09:00 in Hong Kong). These are the hours inside both working days, so nobody is up early or late. It is a short window, so keep the meeting short and send an agenda in advance.
Calling and travel notes
When it is 09:00 in San Francisco it is 01:00 in Hong Kong in January; when it is 12:00 in San Francisco it is 04:00 in Hong Kong; when it is 17:00 in San Francisco it is 09:00 in Hong Kong. The difference is 12 hours or more, so the two cities are on different dates for part of the day: when it is Monday morning in San Francisco, it is still Sunday in Hong Kong if Hong Kong is behind, or already Monday evening if it is ahead. Always state the date as well as the time when you schedule across this pair. Scheduling between the Americas and Asia is the hardest case in time-zone work: the difference is 12 hours or more, so one side's working day is the other's night. The only workable approach is to meet at the edge of the day — early morning in San Francisco and evening in Hong Kong, or the reverse — and to keep the meeting short. Rotate the awkward hour week by week, or the same side will always be the one giving up its evening. Record the meeting and share notes, so the side that could not attend can still follow the decision.
Worked conversions
Six conversions, for January (offsets San Francisco UTC−08:00, Hong Kong UTC+08:00):
| San Francisco | Hong Kong |
|---|---|
| 08:00 | 00:00 |
| 09:00 | 01:00 |
| 12:00 | 04:00 |
| 14:00 | 06:00 |
| 17:00 | 09:00 |
| 20:00 | 12:00 |
In July, add 1 hour to each Hong Kong time. For the reverse direction, see Hong Kong to San Francisco time.
San Francisco and Hong Kong at a glance
| Fact | San Francisco | Hong Kong |
|---|---|---|
| Country | United States | Hong Kong |
| Region | Americas | Asia |
| IANA time zone | America/Los_Angeles |
Asia/Hong_Kong |
| Standard offset | UTC−08:00 | UTC+08:00 |
| Daylight saving offset | UTC−07:00 | — does not observe |
| Offset in January 2026 | UTC−08:00 | UTC+08:00 |
| Offset in July 2026 | UTC−07:00 | UTC+08:00 |
| Observes daylight saving | Yes | No |
The table is the whole pair in one place. The two numbers that matter most are the January and July offsets: if they are the same in both columns for a city, that city's offset never changes; if they differ, the city observes daylight saving and the difference between the cities moves with it. The individual city pages — time in San Francisco and time in Hong Kong — explain each city's time zone, and the DST pages — San Francisco DST 2026 and Hong Kong DST 2026 — give the exact change dates.
Frequently asked questions
What is the time difference between San Francisco and Hong Kong?
Hong Kong is 16 hours ahead San Francisco right now. In January the difference is 16 hours ahead and in July it is 15 hours ahead — it changes with daylight saving.
How do I schedule a recurring meeting between San Francisco and Hong Kong?
Pick a time inside the overlap — 09:00–17:00 San Francisco time — and set the calendar event in UTC so it moves correctly when the clocks change. Re-check the overlap in March and October, when the difference moves, and rotate the time if the meeting falls outside someone's working day.
What time is it in Hong Kong when it is 09:00 in San Francisco?
It is 01:00 in January and 00:00 in July. The time zone converter gives the answer for any date.
What is the best time for a meeting between San Francisco and Hong Kong?
The best windows in January are 09:00–17:00 San Francisco time — inside both working days.
Does the time difference between San Francisco and Hong Kong change during the year?
Yes. It changes on Sunday, 8 March 2026 and Sunday, 1 November 2026 in 2026, when one city changes its clocks and the other does not.
What time is it in San Francisco when it is 09:00 in Hong Kong?
It is 17:00 in January and 18:00 in July. See Hong Kong to San Francisco time for the full comparison from Hong Kong's side.
What are the time zones of San Francisco and Hong Kong?
San Francisco is in America/Los_Angeles (UTC−08:00 standard time) and Hong Kong is in Asia/Hong_Kong (UTC+08:00 standard time).
What time is it in San Francisco when it is midnight in Hong Kong?
It is 08:00 in San Francisco in January and 09:00 in July — the same day, because San Francisco is ahead of Hong Kong. Midnight conversions are the ones that most often land on the wrong date, so always check the date as well as the time.
Sources
- IANA Time Zone Database, via Node.js Intl (
Intl.DateTimeFormatwithtimeZone) — offsets, daylight saving dates and local times in this article were worked out from the IANA database, not typed from memory. - TimeFlow's own time-zone data (
data/cities.ts,data/dst.ts), computed from the IANA database. - TimeFlow's time zone converter and meeting planner — the live tools behind the numbers on this page.
- Time-zone and daylight saving rules are set by governments and can change. For flights, deadlines and meetings that cannot move, confirm the time with an official source.