US clock change pushes Wall Street later for Asia, Europe

Exchange hours themselves remain unchanged, but the timing of global liquidity overlaps is altered. For Asia-Pacific desks, US cash trading now begins and ends an hour later on their local clocks. This reduces the time between the Wall Street close and the Asian open, shifting when US-driven price moves first impact Asian markets. In Europe, the overlap between London and New York returns to its normal winter pattern after a week when the US was an hour nearer than typical. The chief operational risk involves orders, alerts and automated strategies configured to local clocks that are now mis-timed, especially around US economic data releases and the Sunday futures reopening.

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While the exchanges themselves have not changed their schedules, traders in Sydney, Tokyo or London now see Wall Street effectively operating an hour later than before.

Key facts:

• On Sunday, November 1, the US and most of eastern Canada set clocks back one hour, concluding daylight saving time for the year.
• Exchange trading hours remain identical in local time, so the effect is borne by traders based outside North America.
• The New York cash equity session, 0930-1600 US Eastern, now takes place from 1430 to 2100 GMT, an hour later than previously.
• US economic data released at 0830 ET now arrives at 1330 GMT, while Federal Reserve decisions at 1400 ET come at 1900 GMT.
• Australia has been on daylight saving time since October 4, so Sydney is now 16 hours ahead of New York, the largest time difference of the year.

This week, traders outside North America must adjust their schedules following the one-hour clock change on Sunday, November 1, which ended daylight saving time in the US and most of eastern Canada.

Local exchange hours remain unchanged. The New York Stock Exchange and Nasdaq continue to open at 0930 US Eastern and close at 1600 ET, while the Toronto Stock Exchange retains the same timetable. Since New York is now on Eastern Standard Time, five hours behind GMT, the cash session operates from 1430 to 2100 GMT, one hour later than last week for observers in London, Asia or Australia.

The change affects the economic calendar as well. Most US data, such as payrolls and inflation figures, released at 0830 ET now come out at 1330 GMT. Federal Reserve decisions at 1400 ET now occur at 1900 GMT. CME Globex futures, which reopen at 1800 ET on Sundays and pause daily from 1700 to 1800 ET, now resume at 2300 GMT. The 1700 ET New York close, which marks the FX trading day's cutoff, now happens at 2200 GMT.

The impact is greatest for Asia-Pacific traders. Australia's eastern states shifted to daylight saving on October 4, meaning Sydney and Melbourne are now 16 hours ahead of New York, the widest gap of the year. The US cash open now occurs at 0130 Sydney time (a rather unappealing hour) and closes at 0800, while the weekly futures reopen is at 1000 on Monday morning. In Tokyo, which does not observe daylight saving, Wall Street now trades from 2330 to 0600, and in Singapore and Hong Kong from 2230 to 0500.

European traders have already experienced a similar adjustment. Most of Europe ended summer time on October 25, creating a one-week period when New York opened at 1330 in London. That period has now ended, and the overlap between London and New York has returned to its typical winter pattern.

A new development in Canada adds complexity. British Columbia, Alberta, Manitoba and the Northwest Territories did not adjust their clocks this year after ending seasonal time changes, so some Canadian cities are now an hour apart from their US counterparts. This does not affect the Toronto and Montreal exchanges, as Ontario and Quebec followed the US adjustment.

The next time change occurs on March 14, 2027, when US clocks are set forward.