San Francisco to Shanghai
Time difference, live clocks, and the best window for a call.
San Francisco
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Shanghai
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Shanghai is 15 hours ahead of San Francisco.
Their standard working days (9:00–18:00) never overlap — someone has to take a morning or evening call. Daylight's map shows exactly who pays the smallest price.
Open San Francisco + Shanghai in Daylight
Why a map of light beats a table of numbers
Daylight draws each city's waking day as a field of light on one shared timeline. Where the light blends, your days overlap — you see the answer before you read a single number. Drag through time, add more cities, and share the board as a live link anyone can explore.