Live offset · Year-round DST · Shareable URL

Time difference
Shanghai and Boston

Live clocks (CST ↔ EST), the current gap, month-by-month offset changes, and a full 24-hour map from Shanghai to Boston.

1

Live gap

See the current offset between Shanghai and Boston, with IANA-backed clocks updating every second.

2

Year-round chart

DST can shift the gap by an hour twice a year—the 2026 month table shows every change.

3

Hour-by-hour

Scroll the 24-hour table to map any civil hour in Shanghai into Boston with day-shift cues.

Time difference workspace

How Shanghai and Boston line up today.

2 cities · live offsetGap shifts yearly
City pair

Shanghai Boston

Boston is 12h behind Shanghai at this moment. Compare live clocks, seasonal DST shifts, and hour-by-hour conversions below.

Live offsetIANA zones · updates automatically
Shanghai
Asia/Shanghai
ZoneCST
Offset nowUTC+8
Hour gap
−12h

BostonShanghai

Boston
America/New_York
ZoneEST / EDT
Offset nowUTC-4
About this pairUseful when planning calls or docs

Time difference between Shanghai and Boston: Boston is currently 13 hours behind Shanghai.

This difference is not constant: in winter Shanghai is 13 hours ahead of Boston, while in summer (when one or both observe DST) the gap shifts to 12 hours ahead of. The monthly table below shows the exact offset gap month by month. For practical scheduling, jump to the best-time-to-meet page or the 24-hour conversion table below.

Jump aheadPick the view you need next
Best time to meetMonthly offsets24-hour table
Live clocks workspace

Clocks side by side.

Updates every second
Right nowAsia/Shanghai · America/New_York
Shanghai
Asia/Shanghai
Live time
--:--
OffsetUTC+8
AbbreviationCST
No DST
Boston
America/New_York
Live time
--:--
OffsetUTC-4
AbbreviationEST / EDT
Observes DST
Relationship

Boston is 12h behind Shanghai.

DST rules can widen or shrink this gap for a few weeks each spring and autumn—the month table below shows how many hours Boston sits ahead of or behind Shanghai through the calendar year.

Next stepsPlan overlap or convert zones
Best time to meet →CST → EST →Overlap Finder →
Year-round

Offset changes by month

Sampled mid-month for 2026. Compares Boston versus Shanghai; a value of +3h means Boston is three hours ahead of Shanghai.

2026 calendar

Month-by-month gap

MonthDifference (Boston vs Shanghai)
January-13h
February-13h
March-12h
April-12h
May-12h
June-12h
July-12h
August-12h
September-12h
October-12h
November-13h
December-13h
Hour by hour

24-hour conversion table

Every civil hour in Shanghai mapped into Boston; day-shift cues follow active DST for both zones today.

ShanghaiBoston

Hourly wall-clock map for today — midnight crossings show as day shifts.

Shanghai with part-of-day icon
Boston arrow and converted time
Day
  • 00:00
    12:00
    Prev day
  • 01:00
    13:00
    Prev day
  • 02:00
    14:00
    Prev day
  • 03:00
    15:00
    Prev day
  • 04:00
    16:00
    Prev day
  • 05:00
    17:00
    Prev day
  • 06:00
    18:00
    Prev day
  • 07:00
    19:00
    Prev day
  • 08:00
    20:00
    Prev day
  • 09:00
    21:00
    Prev day
  • 10:00
    22:00
    Prev day
  • 11:00
    23:00
    Prev day
  • 12:00
    00:00
    Same day
  • 13:00
    01:00
    Same day
  • 14:00
    02:00
    Same day
  • 15:00
    03:00
    Same day
  • 16:00
    04:00
    Same day
  • 17:00
    05:00
    Same day
  • 18:00
    06:00
    Same day
  • 19:00
    07:00
    Same day
  • 20:00
    08:00
    Same day
  • 21:00
    09:00
    Same day
  • 22:00
    10:00
    Same day
  • 23:00
    11:00
    Same day
Uses your browser's IANA zone data — choose another date in the converter for historical or future days.
Keep exploring

Related pages

More time-difference routes, pairwise best times, triple-city overlaps, and conversions tied to Shanghai, Boston, or this corridor.

FAQ

Frequently asked questions

Offsets between Shanghai and Boston, DST shifts, scheduling, and how we source timezone data—plus how to share this page.

Currently, Boston is 12h behind Shanghai. This may change through the year if either city observes Daylight Saving Time.