GlenCalc

Time zone calculator

Pick the date, time and the two places. Daylight saving rules for that date are applied using your browser’s time zone database.

Your answer

In London1:00 PMSaturday, October 31, 2026
Difference+4 hours
New York (Eastern)UTC−4
LondonUTC+0

Worked out in your browser. Nothing you type is sent to a server.

How we worked it out

Updated as you change the numbers.

  1. Convert the local time to UTC using the first zone’s offset on that date, then to the second zone’s local time.

Method and assumptions

Time zone offsets and daylight saving dates come from the IANA time zone database built into browsers. Clocks change on different dates in different countries, so the difference between two cities can vary through the year.

Questions

What time is 9 AM New York in London on October 31, 2026?

1 PM. On that date the US is still on daylight saving time but the UK has already switched back, so the gap is 4 hours instead of the usual 5.

Sources

Method and figures checked on . Every worked answer on this page is covered by an automated test. Found a mistake? Tell us.

Embed this calculator on your site

Free to use. Paste this where you want the calculator; it runs in your visitors’ browsers, sets no cookies and sends nothing to us.

Related calculators