LONDON — For a week every October, people organizing international catch-ups and meetings on both sides of the Atlantic may be briefly confused: Did I just miss that conference call? Why is my grandmother calling me so early?

What You Need To Know

Every October, there's a week when Europe and the U.S. are out of sync with daylight saving time, potentially confusing people organizing international meetings

Most countries don't observe daylight saving time, but those that do, like Europe and North America, change clocks on different dates

In the U.K. and Europe, clocks go back on the last Sunday in October. In the U.S. and Canada, it's the first Sunday in November

This creates a temporary one-hour change in the time difference between London and New York, for example

Most people quickl

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