9am in Sydney is 4pm in San Francisco
MEETING PLANNER
hover a column · click to lockSydney is 17 hours ahead of San Francisco. San Francisco runs on America/Los_Angeles (UTC-7); Sydney runs on Australia/Sydney (UTC+10). The difference is measured right now; it can shift by one hour during daylight-saving-time transitions.
Both San Francisco and Sydney observe daylight saving time, but their transition dates are not identical. San Francisco shifts between PST (UTC-8) and PDT (UTC-7); Sydney shifts between AEST (UTC+10) and AEDT (UTC+11). The difference between them stays close to 18 hours across most of the year, with short mismatch windows around each city’s transition when the gap briefly widens or narrows by an hour.
Standard 9-to-5 business hours in San Francisco and Sydney do not overlap. Teams operating across this pair either stretch their schedules — an early-morning call from the westward city lands as an evening call in the eastward one — or rely fully on asynchronous tools. Scheduled windows at the edges (first thing for one side, last thing for the other) are the usual compromise, with one side absorbing the unsocial-hours cost this week and the other side next week.
When planning recurring meetings across San Francisco and Sydney, pin them to one city’s local time rather than UTC or the other city’s clock. That way, the meeting time stays stable for the person anchoring the schedule, and the other side absorbs the one-hour drift during DST transitions. The alternative — a meeting pinned to the non-DST city — means the DST city sees the meeting time “move” twice a year, which is how recurring calendar invites end up at 7am on someone’s calendar in October.
- What is the time difference between San Francisco and Sydney?
- Sydney is currently 17 hours ahead of San Francisco. San Francisco is on America/Los_Angeles (UTC-7); Sydney is on Australia/Sydney (UTC+10). The offset shifts by one hour during daylight-saving transitions — the difference is 18 hours in winter and 18 hours in summer.
- Do San Francisco and Sydney observe daylight saving time?
- Both cities observe daylight saving time. San Francisco uses PST in winter and PDT in summer; Sydney uses AEST in winter and AEDT in summer. Their transition dates can differ by a week or two, which briefly widens or narrows the offset during the changeover period.
- When do business hours overlap between San Francisco and Sydney?
- Standard 9-to-5 business hours do not overlap. Real-time calls require at least one side to work outside normal hours; most teams default to async or schedule edge-of-day windows.
Frequently Asked Questions
What is the time difference between San Francisco and Sydney?
Sydney is currently 17 hours ahead of San Francisco. San Francisco is on America/Los_Angeles (UTC-7); Sydney is on Australia/Sydney (UTC+10). The offset shifts by one hour during daylight-saving transitions — the difference is 18 hours in winter and 18 hours in summer.
Do San Francisco and Sydney observe daylight saving time?
Both cities observe daylight saving time. San Francisco uses PST in winter and PDT in summer; Sydney uses AEST in winter and AEDT in summer. Their transition dates can differ by a week or two, which briefly widens or narrows the offset during the changeover period.
When do business hours overlap between San Francisco and Sydney?
Standard 9-to-5 business hours do not overlap. Real-time calls require at least one side to work outside normal hours; most teams default to async or schedule edge-of-day windows.