How many hours ahead is Shanghai compared to New York?

Shanghai is either 12 or 13 hours ahead of New York. The gap is 13 hours when New York is on EST (UTC-5) and Shanghai is on CST (UTC+8), and 12 hours when New York is on EDT (UTC-4). Shanghai does not observe daylight saving time, so only New York's DST transitions change the offset.

Does this tool account for daylight saving time?

Yes. The tool uses the browser's built-in Intl.DateTimeFormat API with full IANA timezone identifiers (America/New_York and Asia/Shanghai), which automatically applies the correct DST offset for any date throughout the year. Shanghai always stays at UTC+8.

What time zones are New York and Shanghai in?

New York observes Eastern Standard Time (EST, UTC-5) in winter and Eastern Daylight Time (EDT, UTC-4) in summer. Shanghai observes China Standard Time (CST, UTC+8) year-round and does not observe daylight saving time.

Is there a good time to schedule a call between New York and Shanghai?

There is no overlap between standard 9 AM–6 PM workdays in the two cities. Practical calls require flexible hours, such as early New York mornings (7–9 AM ET) and late Shanghai evenings (7–10 PM). The tool's overlap panel therefore reports no standard business-hours overlap.

Does the clock use my local computer time?

Yes, it reads your device's system clock and converts it to both timezones. If your device clock is accurate, both displayed times will be accurate.

Time Difference: New York to Shanghai

See the live current time in New York and Shanghai side by side, with the exact hour offset updated every second.

New York

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EST / EDT

Shanghai

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CST (UTC+8)

Current Offset

Overlapping Business Hours

New York window

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Shanghai window

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Standard overlap assumes both cities work 9 AM–6 PM on weekdays.

Summary

This tool displays live, side-by-side clocks for New York (America/New_York timezone) and Shanghai (Asia/Shanghai timezone). The hour offset updates automatically, accounting for New York's daylight saving time shifts. Shanghai does not observe DST, so the gap changes when New York transitions. No page refresh needed — the clocks tick every second in your browser.

How it works

Your browser reads the current UTC timestamp every second.
It converts that timestamp into America/New_York local time using the Intl API.
It converts the same timestamp into Asia/Shanghai local time.
Both clocks and the computed hour offset are rendered live on screen.
The offset adjusts automatically when New York switches to or from daylight saving time.

Use cases

Schedule a call or meeting between New York and Shanghai colleagues.
Check whether Shanghai business hours overlap with New York office hours.
Verify the current UTC offset for EST, EDT, or China Standard Time (CST).
Quickly confirm how many hours Shanghai is ahead of New York right now.
Help remote teams plan across the US–China time gap.
Double-check a flight arrival or departure time in the other city.

Frequently Asked Questions

Last updated: 2026-06-11 · Reviewed by Nham Vu