New York to London Time Converter

The Two Stock Exchanges on One Clock

The two big exchanges give a hard test of the gap, because both run fixed local hours. On the usual 5-hour gap:

Both are open together from 2:30 to 4:30 PM in London, which is 9:30 AM to 11:30 AM in New York: two hours. In the 4-hour weeks New York opens at 1:30 PM London time, so the shared stretch is three hours. The hours are the London Stock Exchange's regular trading session and the NYSE core session; both exchanges also run auctions and extended sessions outside them.

New York Hours in London Time

Full 24-hour reference table. Use the live clocks above for the exact current offset.

* "next day" = converted time falls on the following calendar day.

When Both Offices Are Working

On 9-to-5 days London finishes at 5:00 PM, which is 12:00 PM in New York. The shared window is therefore 9:00 AM to 12:00 PM in New York, 2:00 PM to 5:00 PM in London, and a call booked after noon in New York reaches London after its day has ended. In the 4-hour weeks London's 5:00 PM is 1:00 PM in New York, so the window runs from 9:00 AM to 1:00 PM there, 1:00 PM to 5:00 PM in London.

The Weeks When the Gap Is 4 Hours

The US and the UK change their clocks on different Sundays, so two short periods have one side on summer time and the other on winter time:

• In spring, from the second Sunday in March (New York moves to EDT) to the last Sunday in March (London moves to BST): two to three weeks.
• In autumn, from the last Sunday in October (London moves back to GMT) to the first Sunday in November (New York moves back to EST): one week.

9:00 AM in New York is 2:00 PM in London on the usual gap and 1:00 PM in those weeks. The DST pages list the exact dates for each year.

Getting Something to London Before It Closes

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