What is the time difference between Hangzhou and San Francisco?
San Francisco is 15 hours behind Hangzhou right now. When it is noon in Hangzhou, it is 20:00 in San Francisco. (Shifts by an hour around daylight saving.)
Flying between Hangzhou and San Francisco? Beat the jet lag.Captain Wake locks your new wake-up time in place — finish a real mission to turn it off.
What is the time difference between Hangzhou and San Francisco?
San Francisco is 15 hours behind Hangzhou right now (UTC+8 vs UTC-7). Because one or both observe daylight saving, the gap ranges between 16 and 15 hours across the year.
How many hours ahead is San Francisco?
San Francisco is actually 15 hours behind Hangzhou. When it is noon in Hangzhou, it is 20:00 in San Francisco.
When is the best time to call between Hangzhou and San Francisco?
Look for the overlap where both cities are in normal daytime. The strip on this page highlights 9am–5pm in each — the shaded columns that line up are your window. Large gaps mean early-morning or late-night calls for one side.
Does the difference change with daylight saving?
Yes. One or both of these cities change their clocks, so the difference shifts by an hour for part of the year. The figure above is the current difference.
Why people use Captain Wake to wake up on time
Not because it rings louder. Because it removes every way your half-asleep brain talks you back into bed.
1
There is no button to tap
Swiping an alarm away is a reflex you can perform while still asleep. A mission needs your thinking brain switched on — and once it is on, sinking back under is much harder.
2
It survives every trick
Force-quit the app, restart the phone, flip it to silent, turn the volume down. The alarm re-arms and keeps going until the mission is actually done.
3
It gets you physically upright
Photo and barcode missions are anchored to a spot in another room, so the only way to stop the noise is to stand up and walk there. You cannot pre-stage it from bed.
4
It fixes the night, not just the morning
A sleep forecast before bed, bedtime reminders and wake-up streaks — because the 6 AM problem usually starts at 1 AM.
New time zone? Your body clock needs a firmer alarm.
Captain Wake keeps ringing until you complete a real-world mission — the fastest way to anchor a new wake-up time.
